PHP intercepts strings in utf-8 format

This article mainly introduces the PHP interception utf-8 format string Instance code of the relevant data, and attached to the example code, the need for friends can refer to the following

PHP intercepts strings in utf-8 format

In PHP, we often need to intercept strings. English characters occupy one byte, Chinese characters occupy two bytes, but Chinese characters occupy two bytes is relative to GBK encoding but in the current international popular UTF8 encoding, a Chinese character occupies 3 bytes. This article introduces you to PHP's function of intercepting utf-8 format strings.

To illustrate:

function truncate_utf8_string ($string, $length, $etc = ' ... ') {$result = '; $string = Html_entity_decode (Trim (strip_ tags ($string)), ent_quotes, ' UTF-8 '); $strlen = strlen ($string); for ($i = 0; (($i < $strlen) && ($length > 0)); $i + +) {if ($number = Strpos (Str_pad (Decbin (substr ($string, $i, 1)), 8, ' 0 ', str_pad_left), ' 0 ')) {
  if ($length < 1.0) {break  ;  }  $result. = substr ($string, $i, $number);  $length-= 1.0;  $i + = $number-1; } else {  $result. = substr ($string, $i, 1);  $length-= 0.5; }} $result = Htmlspecialchars ($result, ent_quotes, ' UTF-8 '); if ($i < $strlen) {$result. = $etc;} return $result;}

If you need to intercept a string in utf-8 format, call this function directly.

<?php  $str = "Call this function directly if you need to intercept a string in utf-8 format." ";  Echo truncate_utf8_string ($STR, 10);//Output result: If you need to intercept utf-8 ...? >

The above is the whole content of this article, I hope that everyone's study has helped.