PHP Array Exercises : Search a specified value within the values of an associative array

Last update on May 30 2025 13:13:59 (UTC/GMT +8 hours)

33. Search Value Within Associative Array

Write a PHP function to search a specified value within the values of an associative array.

Sample Solution:

PHP Code:

<?php
// Define a function named arraysearch that searches for a string in array values
function arraysearch($arra1, $search)
{
 // Reset the array pointer to the beginning
 reset($arra1);
 // Iterate through the array using a while loop
 while (list($key, $val) = each($arra1)) 
 {
 // Check if the search string is found (case-insensitive) in the current array value
 if (preg_match("/$search/i", $val)) 
 {
 // Display a message indicating the search string is found in the current key
 echo $search . " has found in " . $key . "\n";
 } 
 else 
 {
 // Display a message indicating the search string is not found in the current key
 echo $search . " has not found in " . $key . "\n";
 }
 }
}
// Define an associative array of exercises
$exercises = array("part1" => "PHP array", "part2" => "PHP String", "part3" => "PHP Math");
// Call the arraysearch function to search for "Math" in the values of the exercises array
arraysearch($exercises, "Math");
?>

Output:

Math has not found in part1 
Math has not found in part2 
Math has found in part3 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a PHP function to search for a specified value in an associative array and return the corresponding key if found.
• Write a PHP script to iterate over an associative array and output a message if the specified value is present.
• Write a PHP program to use array_search() to look up a value in an associative array and then display its key.
• Write a PHP script to implement a case-insensitive search for a value in an associative array and return the result.

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