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

Deep flattens an array

Example:

<?php
function tips_deepFlatten($items)
{
  $result = [];
  foreach ($items as $item) {
    if (!is_array($item)) {
      $result[] = $item;
    } else {
      array_push($result, ...tips_deepFlatten($item));
    }
  }

  return $result;
}

Print_r(tips_deepFlatten([1, [2], [[3], 4], 5]));
?>

Output:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
)