PHP Chinese string interception method analysis, _PHP tutorial

php Chinese string interception method analysis,

Using the PHP function substr to intercept Chinese characters may cause garbled characters, mainly because substr may forcibly convert a Chinese character " Saw" in half.
Solution:

1. Use the mb_substr interception of the mbstring extension library to avoid garbled characters.

2. Write the interception function yourself, but the efficiency is not as high as using the mbstring extension library.

3. If it is just to output the intercepted string, it can be implemented in the following way: substr($str, 0, 30).chr(0).

The substr() function can split text, but if the text to be split includes Chinese characters, you will often encounter problems. In this case, you can use the mb_substr()/mb_strcut function. The usage of mb_substr()/mb_strcut is the same as that of substr () is similar, except that one more parameter needs to be added at the end of mb_substr()/mb_strcut to set the encoding of the string. However, most servers do not open php_mbstring.dll. You need to open php_mbstring.dll in php.ini.

For example:

<?<span>php
</span><span>echo</span> mb_substr('这样一来我的字符串就不会有乱码^_^', 0, 7, 'utf-8'<span>);
</span>?>

Output: This way my words

<?<span>php
</span><span>echo</span> mb_strcut('这样一来我的字符串就不会有乱码^_^', 0, 7, 'utf-8'<span>);
</span>?>

Output: like this

mb_substr splits characters by words, while mb_strcut splits characters by bytes, but neither will produce half a character.

How to intercept Chinese text strings without garbled characters using PHP

<?<span>php
</span><span>//</span><span>此函数完成带汉字的字符串取串</span>
<span>function</span> substr_CN(<span>$str</span>,<span>$mylen</span><span>){ 
</span><span>$len</span>=<span>strlen</span>(<span>$str</span><span>);
</span><span>$content</span>=''<span>;
</span><span>$count</span>=0<span>;
</span><span>for</span>(<span>$i</span>=0;<span>$i</span><<span>$len</span>;<span>$i</span>++<span>){
</span><span>if</span>(<span>ord</span>(<span>substr</span>(<span>$str</span>,<span>$i</span>,1))>127<span>){
</span><span>$content</span>.=<span>substr</span>(<span>$str</span>,<span>$i</span>,2<span>);
</span><span>$i</span>++<span>; // www.jbxue.com
}</span><span>else</span><span>{
</span><span>$content</span>.=<span>substr</span>(<span>$str</span>,<span>$i</span>,1<span>);
}
</span><span>if</span>(++<span>$count</span>==<span>$mylen</span><span>){
</span><span>break</span><span>;
}
}
</span><span>echo</span> <span>$content</span><span>;
}

 

</span><span>$str</span>="34中华人民共和国56"<span>;
substr_CN(</span><span>$str</span>,3);<span>//</span><span>输出34中</span>
?>

Reference article:

Detailed explanation of substr string interception function examples in php

Usage of substr string interception function in php

Support Chinese php string interception function