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stristr	strnatcasecmp

String Functions	Last updated: Mon, 26 Oct 2026

strlen

(PHP 4, PHP 5, PHP 7, PHP 8)

strlen — Get string length

Description

function strlen(string $string): int

Returns the length of the given string.

Parameters

string: The string being measured for length.

Return Values

The length of the string in bytes.

Examples

Example #1 A strlen() example

<?php
$str = 'abcdef';
echo strlen($str), PHP_EOL; // 6

$str = ' ab cd ';
echo strlen($str), PHP_EOL; // 7
?>

Notes

Note:
strlen() returns the number of bytes rather than the number of characters in a string.

See Also

count() - Counts all elements in an array or in a Countable object
grapheme_strlen() - Get string length in grapheme units
iconv_strlen() - Returns the character count of string
mb_strlen() - Get string length

stristr	strnatcasecmp

String Functions	Last updated: Mon, 26 Oct 2026