Use PHP functions to calculate the length of Chinese and English strings. _ PHP Tutorial

The PHP function is used to calculate the length of Chinese and English strings ,. Using PHP functions to calculate the length of Chinese and English strings, this article describes how to use PHP functions to calculate the length of Chinese and English strings. Share it with you for your reference. The specific implementation uses PHP functions to calculate the length of Chinese and English strings,

This example describes how to use PHP functions to calculate the length of Chinese and English strings. Share it with you for your reference. The specific implementation method is as follows:

Generally, we know that English characters take up one byte, while Chinese characters gbk take up two, and utf8 take up three. many people think that php calculates the string length as the strlen () function, it calculates the length of bytes rather than the length of characters. how can we get the length of characters in a string? There is also mb_strlen ().

The code is as follows:

The code is as follows:

Echo $ str = 'php point passthrough ';

Echo strlen ($ str); // 3*1 + 3*3 = 12
Echo mb_strlen ($ str, 'gb2312'); // 3*1 + 3*2 = 9
Echo mb_strlen ($ str, 'utf-8'); // 6

Sadly, the mb series functions are not the core functions of PHP and are not enabled by default. There is also a super simple method to break strings into individual characters through regular expressions, the number of characters is the length of the string. the code is as follows:

The code is as follows:

<? Php
Function _ strlen ($ str)
{
Preg_match_all ("/./us", $ str, $ matches );
Return count (current ($ matches ));
}

Echo _ strlen ("PHP point-to-point"); // 6
?>

I hope this article will help you with PHP programming.

Examples in this article describe how to use PHP functions to calculate the length of Chinese and English strings. Share it with you for your reference. Implementation...