Practice 150 PHP Basic Algorithm Programming Questions, TechnoVlogs

Practice 150 PHP Basic Algorithm Programming Questions


Q1. Write a PHP program to find the factorial of a given number.  
Input: 
$n = 5;

Expected Output:    
Factorial of 5: 120

Q2. Write a PHP program to find the sum of the digits of a number.  
Input:  
$n = 123;

Expected Output:    
Sum of Digits: 6  

Q3. Write a PHP program to check if a given number is prime.  
Input:  
$n = 7;

Expected Output:    
7 is a Prime Number

Q4. Write a PHP program to print the Fibonacci sequence up to a given number of terms.  
Input:  
$terms = 5;

Expected Output:    
Fibonacci Sequence: 0, 1, 1, 2, 3

Q5. Write a PHP program to reverse the digits of a number.  
Input:  
$n = 12345;

Expected Output:    
Reversed Number: 54321 

Q6. Write a PHP program to find the greatest common divisor (GCD) of two numbers.  
Input: 
$a = 12;  
$b = 15;

Expected Output:    
GCD of 12 and 15: 3

Q7. Write a PHP program to check if a given number is even or odd.  
Input:  
$n = 4;

Expected Output:    
4 is an Even Number

Q8. Write a PHP program to find the largest element in an array.  
Input:  
$array = [1, 5, 3, 9, 2];

Expected Output:    
Largest Element: 9

Q9. Write a PHP program to sort an array in ascending order.  
Input:  
$array = [4, 1, 7, 3, 9];

Expected Output:    
Sorted Array: [1, 3, 4, 7, 9] 

Q10. Write a PHP program to find the missing number in a sequence of numbers.  
Input:  
$array = [1, 2, 4, 5, 6];

Expected Output:    
Missing Number: 3 

Q11. Write a PHP program to calculate the power of a number (base^exponent).  
Input:  
$base = 2;
$exponent = 3;

Expected Output:    
2 raised to the power of 3: 8  

Q12. Write a PHP program to count the number of words in a string.  
Input:  
$string = "Hello world, welcome to PHP!";

Expected Output:    
Number of Words: 5

Q13. Write a PHP program to generate a multiplication table for a given number.  
Input:  
$number = 3;

Expected Output:    
Multiplication Table of 3:  
3 x 1 = 3  
3 x 2 = 6  
3 x 3 = 9  
3 x 4 = 12  
3 x 5 = 15  
3 x 6 = 18  
3 x 7 = 21  
3 x 8 = 24  
3 x 9 = 27  
3 x 10 = 30

Q14. Write a PHP program to check if a given number is an Armstrong number.  
Input:  
$n = 153;

Expected Output:    
153 is an Armstrong Number 

Q15. Write a PHP program to find the length of a string.  
Input:  
$string = "hello";

Expected Output:    
Length of the string: 5 

Q16. Write a PHP program to convert a decimal number to binary.  
Input:  
$decimal = 10;

Expected Output:    
Binary of 10: 1010

Q17. Write a PHP program to check if a given number is a perfect number.  
Input:  
$n = 28;

Expected Output:    
28 is a Perfect Number

Q18. Write a PHP program to remove duplicate values from an array.  
Input:  
$array = [1, 2, 2, 3, 4, 4, 5];

Expected Output:    
Array without duplicates: [1, 2, 3, 4, 5]

Q19. Write a PHP program to find the average of the numbers in an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Average: 30  

Q20. Write a PHP program to find the second largest element in an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Second Largest Element: 40

Q21. Write a PHP program to check if a string contains a specific substring.  
Input:  
$string = "hello world";  
$substring = "world";

Expected Output:    
The string contains 'world': Yes 

Q22. Write a PHP program to find the smallest element in an array.  
Input:  
$array = [10, 20, 5, 30, 40];

Expected Output:    
Smallest Element: 5 

Q23. Write a PHP program to reverse a string.  
Input:  
$string = "hello";

Expected Output:    
Reversed String: olleh 

Q24. Write a PHP program to convert a binary number to decimal.  
Input:  
$binary = "1010";

Expected Output:    
Decimal of 1010: 10

Q25. Write a PHP program to find the sum of the first N natural numbers.  
Input:  
$n = 5;

Expected Output:    
Sum of first 5 natural numbers: 15 

Q26. Write a PHP program to check if a given number is a perfect square.  
Input:  
$n = 16;

Expected Output:    
16 is a Perfect Square

Q27. Write a PHP program to count the number of occurrences of a specific character in a string.  
Input:  
$string = "hello world";  
$char = "o";

Expected Output:    
'o' appears 2 times in the string.

Q28. Write a PHP program to find the product of all elements in an array.  
Input:  
$array = [1, 2, 3, 4];

Expected Output:    
Product of Elements: 24  

Q29. Write a PHP program to find the common elements in two arrays.  
Input:  
$array1 = [1, 2, 3, 4, 5];  
$array2 = [3, 4, 5, 6, 7];

Expected Output:    
Common Elements: [3, 4, 5] 

Q30. Write a PHP program to check if a given number is a palindrome.  
Input:  
$n = 121;

Expected Output:    
121 is a Palindrome Number

Q31. Write a PHP program to find the sum of the first N odd numbers.  
Input:  
$n = 5;

Expected Output:    
Sum of first 5 odd numbers: 25  

Q32. Write a PHP program to convert Celsius to Fahrenheit.  
Input:  
$celsius = 25;

Expected Output:    
25°C is equal to 77°F  

Q33. Write a PHP program to convert Fahrenheit to Celsius.  
Input:  
$fahrenheit = 77;

Expected Output:    
77°F is equal to 25°C  

Q34. Write a PHP program to find the maximum of three numbers.  
Input:  
$a = 12;  
$b = 25;  
$c = 19;

Expected Output:    
Maximum of 12, 25, 19: 25

Q35. Write a PHP program to check if a year is a leap year.  
Input:  
$year = 2024;

Expected Output:    
2024 is a Leap Year 

Q36. Write a PHP program to find the number of even and odd numbers in an array.  
Input:  
$array = [1, 2, 3, 4, 5, 6];

Expected Output:    
Even Numbers: 3  
Odd Numbers: 3

Q37. Write a PHP program to check if a string is a palindrome.  
Input:  
$string = "madam";

Expected Output:    
'madam' is a Palindrome String 

Q38. Write a PHP program to swap two numbers without using a third variable.  
Input:  
$a = 5;  
$b = 10;

Expected Output:    
Swapped values: a = 10, b = 5  

Q39. Write a PHP program to calculate the sum of all the elements in an array.  
Input:  
$array = [1, 2, 3, 4, 5];

Expected Output:    
Sum of Array: 15

Q40. Write a PHP program to find the average of numbers in an array.  
Input:  
$array = [5, 10, 15, 20, 25];

Expected Output:    
Average: 15

Q41. Write a PHP program to check if a string contains only numbers.  
Input:  
$string = "12345";

Expected Output:    
The string contains only numbers: Yes

Q42. Write a PHP program to find the frequency of a character in a string.  
Input:  
$string = "hello world";  
$char = "o";

Expected Output:    
Frequency of 'o': 2

Q43. Write a PHP program to find the sum of all positive numbers in an array.  
Input:  
$array = [-1, 2, 3, -4, 5];

Expected Output:    
Sum of Positive Numbers: 10  

Q44. Write a PHP program to count the number of digits in a number.  
Input:  
$n = 12345;

Expected Output:    
Number of digits: 5

Q45. Write a PHP program to check if a string is in uppercase.  
Input:  
$string = "HELLO";

Expected Output:    
The string is in uppercase: Yes 

Q46. Write a PHP program to find the median of an array.  
Input:  
$array = [1, 3, 5, 7, 9];

Expected Output:    
Median: 5  

Q47. Write a PHP program to find the mode of an array (the most frequent element).  
Input:  
$array = [1, 2, 2, 3, 3, 3, 4];

Expected Output:    
Mode: 3  

Q48. Write a PHP program to convert a string to lowercase.  
Input:  
$string = "HELLO WORLD";

Expected Output:    
Lowercase String: hello world

Q49. Write a PHP program to print a triangle pattern of stars.  
Input:  
$rows = 5;

Expected Output:    
*
**
***
****
*****

Q50. Write a PHP program to convert a string into an array of characters.  
Input:  
$string = "hello";

Expected Output:    
Array: ['h', 'e', 'l', 'l', 'o'] 

Q51. Write a PHP program to find the largest prime number less than a given number N.  
Input:  
$n = 20;

Expected Output:    
Largest Prime Number Less Than 20: 19 

Q52. Write a PHP program to calculate the factorial of a number.  
Input:  
$n = 5;

Expected Output:    
Factorial of 5: 120  

Q53. Write a PHP program to convert a number to Roman numerals.  
Input:  
$n = 9;

Expected Output:    
Roman Numeral: IX  

Q54. Write a PHP program to find the sum of digits of a number.  
Input:  
$n = 12345;

Expected Output:    
Sum of digits: 15 

Q55. Write a PHP program to reverse the words in a sentence.  
Input:  
$sentence = "Hello World PHP";

Expected Output:    
Reversed Sentence: PHP World Hello  

Q56. Write a PHP program to check if a given number is prime.  
Input:  
$n = 17;

Expected Output:    
17 is a Prime Number 

Q57. Write a PHP program to find the second smallest element in an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Second Smallest Element: 20 

Q58. Write a PHP program to check if a given number is even or odd.  
Input:  
$n = 7;

Expected Output:    
7 is Odd  

Q59. Write a PHP program to find the number of vowels in a string.  
Input:  
$string = "hello";

Expected Output:    
Number of Vowels: 2 

Q60. Write a PHP program to sort an array in ascending order.  
Input:  
$array = [5, 3, 8, 1, 2];

Expected Output:    
Sorted Array: [1, 2, 3, 5, 8] 

Q61. Write a PHP program to merge two arrays into a single array.  
Input:  
$array1 = [1, 2, 3];  
$array2 = [4, 5, 6];

Expected Output:    
Merged Array: [1, 2, 3, 4, 5, 6]

Q62. Write a PHP program to remove duplicate elements from an array.  
Input:  
$array = [1, 2, 3, 2, 1, 4, 5];

Expected Output:    
Array without duplicates: [1, 2, 3, 4, 5]

Q63. Write a PHP program to count the number of words in a string.  
Input:  
$string = "Hello World PHP";

Expected Output:    
Number of Words: 3  

Q64. Write a PHP program to convert a string to title case (first letter of each word capitalized).  
Input: 
$string = "hello world php";

Expected Output:    
Title Case: Hello World Php 

Q65. Write a PHP program to find the largest element in an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Largest Element: 50

Q66. Write a PHP program to find the difference between two arrays (elements in the first array but not in the second).  
Input:  
$array1 = [1, 2, 3, 4, 5];  
$array2 = [3, 4, 5, 6, 7];

Expected Output:    
Difference: [1, 2] 

Q67. Write a PHP program to check if a number is divisible by another number.  
Input:  
$num = 10;  
$divisor = 2;

Expected Output:    
10 is divisible by 2 

Q68. Write a PHP program to find the GCD of two numbers.  
Input:  
$a = 60;  
$b = 48;

Expected Output:    
GCD of 60 and 48: 12

Q69. Write a PHP program to find the LCM of two numbers.  
Input:  
$a = 12;  
$b = 15;

Expected Output:    
LCM of 12 and 15: 60

Q70. Write a PHP program to check if a string starts with a specific word.  
Input:  
$string = "Hello World";  
$word = "Hello";

Expected Output:    
The string starts with 'Hello': Yes 

Q71. Write a PHP program to check if a string ends with a specific word.  
Input:  
$string = "Hello World";  
$word = "World";

Expected Output:    
The string ends with 'World': Yes

Q72. Write a PHP program to find the power of a number (x raised to the power y).  
Input:  
$x = 2;  
$y = 3;

Expected Output:    
2 raised to the power of 3: 8  

Q73. Write a PHP program to find the average of numbers in an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Average: 30  

Q74. Write a PHP program to convert a string into an array of words.  
Input:  
$string = "Hello World PHP";

Expected Output:    
Array: ['Hello', 'World', 'PHP']

Q75. Write a PHP program to check if a string contains a specific substring.  
Input:  
$string = "Hello World";  
$substring = "World";

Expected Output:    
The string contains 'World': Yes  

Q76. Write a PHP program to remove a specific element from an array.  
Input:  
$array = [1, 2, 3, 4, 5];  
$element = 3;

Expected Output:    
Array after removal: [1, 2, 4, 5]  

Q77. Write a PHP program to find the length of a string.  
Input:  
$string = "Hello World";

Expected Output:    
Length of string: 11  

Q78. Write a PHP program to check if a number is a perfect number.  
Input:  
$n = 28;

Expected Output:    
28 is a Perfect Number 

Q79. Write a PHP program to find the sum of all even numbers in an array.  
Input:  
$array = [1, 2, 3, 4, 5, 6];

Expected Output:    
Sum of Even Numbers: 12  

Q80. Write a PHP program to check if a number is an Armstrong number.  
Input:  
$n = 153;

Expected Output:    
153 is an Armstrong Number

Q81. Write a PHP program to find the factorial of a number using recursion.  
Input:  
$n = 5;

Expected Output:    
Factorial of 5: 120

Q82. Write a PHP program to reverse a string using recursion.  
Input:  
$string = "hello";

Expected Output:    
Reversed String: olleh 

Q83. Write a PHP program to generate the Fibonacci sequence up to the nth term.  
Input:  
$n = 6;

Expected Output:    
Fibonacci Sequence: 0 1 1 2 3 5

Q84. Write a PHP program to check if a string is a palindrome.  
Input:  
$string = "madam";

Expected Output:    
'madam' is a Palindrome 

Q85. Write a PHP program to find the sum of elements in an array using recursion.  
Input:  
$array = [1, 2, 3, 4, 5];

Expected Output:    
Sum of Array: 15

Q86. Write a PHP program to calculate the power of a number using recursion.  
Input:  
$x = 2;  
$y = 3;

Expected Output:    
2 raised to the power of 3: 8 

Q87. Write a PHP program to merge two arrays without duplicates.  
Input:  
$array1 = [1, 2, 3];  
$array2 = [2, 3, 4];

Expected Output:    
Merged Array without Duplicates: [1, 2, 3, 4]  

Q88. Write a PHP program to create a simple calculator that performs addition, subtraction, multiplication, and division.  
Input:  
$num1 = 10;  
$num2 = 5;  
$operation = "addition";  

Expected Output:    
Result: 15  

Q89. Write a PHP program to find the smallest element in an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Smallest Element: 10

Q90. Write a PHP program to count the number of occurrences of a word in a string.  
Input:  
$string = "hello hello world hello";  
$word = "hello";

Expected Output:    
Number of occurrences of 'hello': 3 

Q91. Write a PHP program to check if a given number is a perfect square.  
Input:  
$n = 16;

Expected Output:    
16 is a Perfect Square  

Q92. Write a PHP program to remove all whitespaces from a string.  
Input:  
$string = " Hello World ";

Expected Output:    
String without whitespaces: HelloWorld

Q93. Write a PHP program to find the mode of an array.  
Input:  
$array = [1, 2, 3, 3, 4, 4, 4, 5];

Expected Output:    
Mode: 4

Q94. Write a PHP program to replace a word in a string.  
Input:  
$string = "Hello World";  
$oldWord = "World";  
$newWord = "PHP";

Expected Output:    
Replaced String: Hello PHP 

Q95. Write a PHP program to check if an array is sorted in ascending order.  
Input: 
$array = [1, 2, 3, 4, 5];

Expected Output:    
The array is sorted in ascending order.

Q96. Write a PHP program to convert a string to uppercase.  
Input:  
$string = "hello world";

Expected Output:    
Uppercase String: HELLO WORLD

Q97. Write a PHP program to convert a string to lowercase.  
Input:  
$string = "HELLO WORLD";

Expected Output:    
Lowercase String: hello world 

Q98. Write a PHP program to find the intersection of two arrays.  
Input:  
$array1 = [1, 2, 3, 4, 5];  
$array2 = [4, 5, 6, 7];

Expected Output:    
Intersection: [4, 5]

Q99. Write a PHP program to create a simple countdown timer that counts down from a given number of seconds.  
Input:  
$seconds = 10;

Expected Output:    
Countdown: 10, 9, 8, 7, 6, 5, 4, 3, 2, 1

Q100. Write a PHP program to generate a random number between two given numbers.  
Input:  
$min = 1;  
$max = 100;

Expected Output:    
Random Number: 42 (this will vary each time)

Q101. Write a PHP program to swap two variables without using a third variable.  
Input:  
$a = 5;  
$b = 10;

Expected Output:    
After swapping: a = 10, b = 5

Q102. Write a PHP program to remove the first element from an array.  
Input:  
$array = [1, 2, 3, 4, 5];

Expected Output:    
Array after removal: [2, 3, 4, 5]  

Q103. Write a PHP program to check if a given year is a leap year.  
Input:  
$year = 2020;

Expected Output:    
2020 is a Leap Year

Q104. Write a PHP program to reverse an array.  
Input:  
$array = [1, 2, 3, 4, 5];

Expected Output:    
Reversed Array: [5, 4, 3, 2, 1] 

Q105. Write a PHP program to count the number of even numbers in an array.  
Input:  
$array = [1, 2, 3, 4, 5, 6];

Expected Output:    
Count of Even Numbers: 3  

Q106. Write a PHP program to sort an array in ascending order.  
Input:  
$array = [5, 3, 8, 1, 2];

Expected Output:    
Sorted Array: [1, 2, 3, 5, 8]  

Q107. Write a PHP program to sort an array in descending order.  
Input:  
$array = [5, 3, 8, 1, 2];

Expected Output:    
Sorted Array: [8, 5, 3, 2, 1] 

Q108. Write a PHP program to find the common elements in two arrays.  
Input:  
$array1 = [1, 2, 3, 4];  
$array2 = [3, 4, 5, 6];

Expected Output:    
Common Elements: [3, 4]

Q109. Write a PHP program to calculate the sum of odd numbers in an array.  
Input:  
$array = [1, 2, 3, 4, 5, 6];

Expected Output:    
Sum of Odd Numbers: 9

Q110. Write a PHP program to create an array of even numbers from 1 to 20.  
Input:  
$n = 20;

Expected Output:    
Even Numbers: [2, 4, 6, 8, 10, 12, 14, 16, 18, 20]  

Q111. Write a PHP program to find the maximum value in an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Maximum Value: 50  

Q112. Write a PHP program to find the minimum value in an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Minimum Value: 10

Q113. Write a PHP program to create an associative array from two indexed arrays.  
Input:  
$keys = ["name", "age", "city"];  
$values = ["John", 25, "New York"];

Expected Output:    
Associative Array: ["name" => "John", "age" => 25, "city" => "New York"]

Q114. Write a PHP program to find the length of an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Length of Array: 5

Q115. Write a PHP program to convert an array to a string.  
Input:  
$array = ["apple", "banana", "cherry"];

Expected Output:    
Array as String: apple, banana, cherry  

Q116. Write a PHP program to merge multiple arrays into one.  
Input:  
$array1 = [1, 2, 3];  
$array2 = [4, 5, 6];  
$array3 = [7, 8, 9];

Expected Output:    
Merged Array: [1, 2, 3, 4, 5, 6, 7, 8, 9]

Q117. Write a PHP program to find the greatest common divisor (GCD) of two numbers.  
Input:  
$a = 36;  
$b = 60;

Expected Output:    
GCD of 36 and 60: 12

Q118. Write a PHP program to check if a number is prime.  
Input:  
$n = 7;

Expected Output:    
7 is a Prime Number 

Q119. Write a PHP program to find the sum of digits of a given number.  
Input:  
$n = 123;

Expected Output:    
Sum of digits: 6 

Q120. Write a PHP program to generate a random string of a given length.  
Input:  
$length = 8;

Expected Output:    
Random String: f2xH8Z7p (output will vary each time)  

Q121. Write a PHP program to remove duplicate values from an array.  
Input:  
$array = [1, 2, 2, 3, 4, 4, 5];

Expected Output:    
Array without Duplicates: [1, 2, 3, 4, 5] 

Q122. Write a PHP program to split a string into an array using a delimiter.  
Input:  
$string = "apple,banana,cherry";  
$delimiter = ",";

Expected Output:    
Array: ["apple", "banana", "cherry"] 

Q123. Write a PHP program to calculate the average of numbers in an array.  
Input:  
$array = [10, 20, 30, 40, 50];

Expected Output:    
Average: 30 

Q124. Write a PHP program to print the first N Fibonacci numbers.  
Input:  
$n = 6;

Expected Output:    
Fibonacci Sequence: 0, 1, 1, 2, 3, 5

Q125. Write a PHP program to convert an array to JSON format.  
Input:  
$array = ["name" => "John", "age" => 25, "city" => "New York"];

Expected Output:    
{"name":"John","age":25,"city":"New York"}

Q126. Write a PHP program to calculate the area of a circle given its radius.  
Input:  
$radius = 5;

Expected Output:    
Area of Circle: 78.54  

Q127. Write a PHP program to check if a string contains a given substring.  
Input:  
$string = "Hello World";  
$substring = "World";

Expected Output:    
'Hello World' contains 'World'

Q128. Write a PHP program to remove the last element from an array.  
Input:  
$array = [1, 2, 3, 4, 5];

Expected Output:    
Array after removal: [1, 2, 3, 4]  

Q129. Write a PHP program to convert a string into an array.  
Input:  
$string = "Hello World";

Expected Output:    
Array: ["Hello", "World"]

Q130. Write a PHP program to create an array of odd numbers from 1 to 20.  
Input:  
$n = 20;

Expected Output:    
Odd Numbers: [1, 3, 5, 7, 9, 11, 13, 15, 17, 19]

Q131. Write a PHP program to find the median of an array.  
Input:  
$array = [1, 3, 4, 2, 5];

Expected Output:    
Median: 3

Q132. Write a PHP program to merge two arrays and remove duplicates.  
Input:  
$array1 = [1, 2, 3, 4];  
$array2 = [3, 4, 5, 6];

Expected Output:    
Merged Array without Duplicates: [1, 2, 3, 4, 5, 6]

Q133. Write a PHP program to reverse a string.  
Input:  
$string = "PHP";

Expected Output:    
Reversed String: PHP

Q134. Write a PHP program to calculate the factorial of a number.  
Input:  
$n = 5;

Expected Output:    
Factorial: 120

Q135. Write a PHP program to generate a random number within a given range.  
Input:  
$min = 10;  
$max = 50;

Expected Output:    
Random Number: 27 (output will vary each time)

Q136. Write a PHP program to calculate the power of a number.  
Input:  
$base = 2;  
$exponent = 3;

Expected Output:    
Power: 8

Q137. Write a PHP program to remove all null values from an array.  
Input:  
$array = [1, null, 3, null, 5];

Expected Output:    
Array without Null Values: [1, 3, 5]

Q138. Write a PHP program to count the occurrences of a specific value in an array.  
Input:  
$array = [1, 2, 3, 1, 4, 1];  
$value = 1;

Expected Output:    
Occurrences of 1: 3

Q139. Write a PHP program to check if a given string is a palindrome.  
Input:  
$string = "madam";

Expected Output:    
madam is a Palindrome

Q140. Write a PHP program to merge multiple arrays into one array.  
Input:  
$array1 = [1, 2];  
$array2 = [3, 4];  
$array3 = [5, 6];

Expected Output:    
Merged Array: [1, 2, 3, 4, 5, 6]

Q141. Write a PHP program to check if a given number is odd or even.  
Input:  
$number = 7;

Expected Output:    
7 is Odd

Q142. Write a PHP program to calculate the sum of all elements in an array.  
Input:  
$array = [1, 2, 3, 4, 5];

Expected Output:    
Sum: 15

Q143. Write a PHP program to find the difference between two arrays.  
Input:  
$array1 = [1, 2, 3, 4];  
$array2 = [3, 4, 5, 6];

Expected Output:    
Difference: [1, 2]

Q144. Write a PHP program to convert a string to uppercase.  
Input:  
$string = "hello world";

Expected Output:    
HELLO WORLD

Q145. Write a PHP program to check if a number is positive, negative, or zero.  
Input:  
$number = -5;

Expected Output:    
-5 is Negative

Q146. Write a PHP program to remove leading and trailing white spaces from a string.  
Input:  
$string = "   Hello World!   ";

Expected Output:    
Hello World!

Q147. Write a PHP program to calculate the length of a string.  
Input:  
$string = "PHP Programming";

Expected Output:    
Length: 16

Q148. Write a PHP program to print the multiplication table of a given number.  
Input:  
$number = 3;

Expected Output:    
3 x 1 = 3  
3 x 2 = 6  
3 x 3 = 9  
...  

Q149. Write a PHP program to find the first non-repeated character in a string.  
Input:  
$string = "swiss";

Expected Output:    
First Non-Repeated Character: w

Q150. Write a PHP program to calculate the square root of a given number.  
Input:  
$number = 16;

Expected Output:    
Square Root: 4

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