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strlen

(PHP 4, PHP 5, PHP 7)

strlenGet string length

Description

int strlen ( string $string )

Returns the length of the given string.

Parameters

string

The string being measured for length.

Return Values

The length of the string on success, and 0 if the string is empty.

Changelog

Version Description
5.3.0 Prior versions treated arrays as the string Array, thus returning a string length of 5 and emitting an E_NOTICE level error.

Examples

Example #1 A strlen() example

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

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

Notes

Note:

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

Note:

strlen() returns NULL when executed on arrays, and an E_WARNING level error is emitted.

See Also

© 1997–2018 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.strlen.php