PHP : Proper way to get UTF-8 character or string length

Problem :

Was trying to get a length of an unicode(UTF-8) character with PHP. Trouble is, PHP echoes back 3, which is technically correct, but not accurate.

For example :

 echo strlen('黄');

will return 3 instead of 1. How to get PHP to count the unicode character as 1?

Diagnostic :

UTF-8 character is multi-byte and need to tell PHP to use the proper encoding to measure the length.

Solution :

Use mb_strlen() function with UTF-8 encoding to get the string length. For example :

 echo mb_strlen('黄', 'UTF-8');

Output :


which is accurate.

References :

  See also : PHP : Extract part of a string starting from the middle

By Adam Ng

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