Array Indexof Php Code Example

Example 1: array_search in php

<?php $array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');  $key = array_search('green', $array); // $key = 2; $key = array_search('red', $array);   // $key = 1; ?>

Example 2: php indexof

strrpos ( string $haystack , mixed $needle [, int $offset = 0 ] ) : int

Example 3: php indexof

strrpos ( string $haystack , mixed $needle [, int $offset = 0 ] ) : int or False return <?php $foo = "0123456789a123456789b123456789c";  // Looking for '0' from the 0th byte (from the beginning) var_dump(strrpos($foo, '0', 0));  // Looking for '0' from the 1st byte (after byte "0") var_dump(strrpos($foo, '0', 1));  $str = 'This is Main String';   if (strpos($str, 'This') !== false) {     echo 'true'; }