Home/ Manual/ strings / functions/ str_contains

str_contains

PHP function Edit on GitHub ✎

(PHP 8)

Determine if a string contains a given substring

Description

str_contains(string $haystack, string $needle): bool

Performs a case-sensitive check indicating if needle is contained in haystack.

Parameters

haystack: The string to search in.
needle: The substring to search for in the haystack.

Return Values

Returns true if needle is in haystack, false otherwise.

Examples

Using the empty string ''

php

<?php
if (str_contains('abc', '')) {
    echo "Checking the existence of the empty string will always return true";
}
?>

The above example will output:

output

Checking the existence of the empty string will always return true

Showing case-sensitivity

php

<?php
$string = 'The lazy fox jumped over the fence';

if (str_contains($string, 'lazy')) {
    echo "The string 'lazy' was found in the string\n";
}

if (str_contains($string, 'Lazy')) {
    echo 'The string "Lazy" was found in the string';
} else {
    echo '"Lazy" was not found because the case does not match';
}

?>