w3resource

PHP: strstr() function

Description

The strstr() function is used to get the first occurrence of a string inside another string.

This function is case-sensitive.

Version:

(PHP 4 and above)

Syntax:

strstr(string_name, search_string, before_search) 

Parameters:

Name Description Required /
Optional
Type
string_name The input string. Required String
search_string The string to search for. Required Mixed*
before_search Returns the part of the string_name before the first occurrence of the search_string when true. Optional Boolean

*Mixed: Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value:

The portion of the string, or false if search_string is not found.

Value Type: String.

Pictorial Presentation

string_strstr

Example:

<?php
$string1="W3RESOURCE.COM";
$newstring=strstr($string1,".");
echo $newstring;
?>

Output:

.COM

View the example in the browser

See also

PHP Function Reference

Previous: strspn
Next: strtolower



PHP: Tips of the Day

In PHP, there are two versions of logical AND and OR operators.

Operator True if
$a and $b Both $a and $b are true
$a && $b Both $a and $b are true
$a or $b Either $a or $b is true
$a || $b Either $a or $b is true

Note that the && and || opererators have higher precedence than and and or. See table below:

Evaluation Result of $e Evaluated as
$e = false || true True $e = (false || true)
$e = false or true False ($e = false) or true

Because of this it's safer to use && and || instead of and and or.