In this article, we will discuss how to find the index of an element in an array in PHP. Array indexing starts from 0 to n-1. We can get the array index by using the array_search() function. This function is used to search for the given element. It will accept two parameters.
Syntax:
array_search('element', $array)
Parameters:
- The first one is the element present in the array.
- The second is the array name.
Return Value: It returns the index number which is an Integer.
Note: We will get the index from indexed arrays and associative arrays.
Example 1: PHP program to get the index of the certain elements from the indexed array.
PHP
<?php // Create an indexed array with 5 subjects $array1 = array('php', 'java', 'css/html', 'python', 'c/c++'); // Get the index of PHP echo array_search('php', $array1); echo "\n"; // Get the index of java echo array_search('java', $array1); echo "\n"; // Get the index of c/c++ echo array_search('c/c++', $array1); echo "\n"; ?> |
Output
0 1 4
Example 2: The following example returns the index of an associative array.
PHP
<?php // Create an associative array // with 5 subjects $array1 = array( 0 => 'php', 1 => 'java', 2 => 'css/html', 3 => 'python', 4 => 'c/c++'); // Get the index of php echo array_search('php', $array1); echo "\n"; // Get the index of java echo array_search('java', $array1); echo "\n"; // Get index of c/c++ echo array_search('c/c++', $array1); echo "\n"; ?> |
Output
0 1 4
