(PHP 4, PHP 5, PHP 7)
strlen — ��ȡ�ַ�������
$string
) : int
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| �汾 | ˵�� |
|---|---|
| 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.
|
Example #1 strlen() ����
<?php
$str = 'abcdef';
echo strlen($str); // 6
$str = ' ab cd ';
echo strlen($str); // 7
?>
Note:
strlen() returns the number of bytes rather than the number of characters in a string.
Note:
strlen() returns
NULLwhen executed on arrays, and anE_WARNINGlevel error is emitted.