PHP stripos() Function

Last Updated : 17 Mar 2025

The stripos() is predefine function of PHP. It is used to find the position of the first occurrence of a string inside another string.

Note: This function is case-insensitive and binary safe.

Syntax:

Parameter	Description	Required/Optional
string	Specify the string to search.	Required.
find	Specify he string to find.	Required.
start	Specify where to begin the search.	Optional.

Example 1

<?php
   echo stripos("PHP is My Fav Language , I love php","PHP");
?>

Output:

Example 2

<?php
   $str=" PHP is My Fav Language";
   echo "Before stripos() function:".$str;
   echo "<br>";
   echo "After using stripos() function: ".stripos($str,"PHP");
?>

Output:

Before stripos() function: PHP is My Fav Language
After using stripos(): 1

Note: There is one whitespace when PHP start so 'stripos() function is used to fiind the position of the first occurrence of "php" inside the string.

Reference:

http://php.net/manual/en/function.stripos.php

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