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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