How to count several characters in php

How to calculate several characters in php: 1. Get the length of the given string string through the strlen function; 2. Get the number of characters in the string using the mb_strlen function.

#The operating environment of this article: Windows 7 system, PHP version 7.4, Dell G3 computer.

How to calculate how many characters in php?

PHP Character Count Calculation

Sometimes, for example, when registering a user, you need to check the length of the user name. The following two functions may be used to make the judgment

• strlen

int strlen ( string $string )

Returns the length of the given string string.

Note: It returns the number of bytes in the string, not the number of characters. Assuming a Chinese character "you" may return 3, it depends on what encoding you use

• mb_strlen

int mb_strlen ( string $str [, string $encoding ] )

Returns the number of characters in the string.

str

Specific string

encoding

encoding parameter is the character encoding. If omitted, the internal character encoding is used.

Note: Be sure to open php_mbstring.dll in the php.ini file.

Recommended learning: "PHP Video Tutorial"

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