w3resource

PHP: strlen() function

Description

The strlen() function is used to return the length of a string.

Version:

(PHP 4 and above)

Syntax:

strlen(string_name)

Parameter:

Name Description Required /
Optional
Type
string_name The specified string. Required String

Return value:

The length of the string on success, and 0 for an empty string.

Value Type: Integer.

Example:

<?php 
$string_name = 'Welcome to w3resource.com';
echo strlen($string_name)."<br>";
$string_name = ' Welcome to w3resource.com  ';
echo strlen($string_name)."<br>";
?>

Output:

25
28

View the example in the browser

See also

PHP Function Reference

Previous: stripos
Next: strnatcmp



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.