PHP intercepts string without garbled characters

GBK encoding interception example

$str = '我是谁'; //gbk编码的字符串 echo mb_substr($str, 0, 1, 'gbk'); //输出 我

The mb_substr method has one more parameter than substr, which is used to specify the string encoding.

utf-8 encoding interception example

$str = '我abc是谁'; //utf-8编码的字符串 echo mb_substr($str, 0, 2, 'utf-8'); //输出 我a

There is no problem mixing Chinese and English.

Note:

1. When using, pay attention to the encoding of the php file and the encoding when displaying the web page.

2. To use this mb_substr method, you need to know the encoding of the string in advance. If you don’t know the encoding, you need to judge. The mbstring library also providesmb_check_encodingto check the string encoding.

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