php intercepts strings in utf-8 format

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php intercepts utf-8 format In the string

#php, we often need to intercept the string. English characters occupy one byte, and Chinese characters occupy two bytes. However, Chinese characters occupy two bytes relative to GBK encoding. However, in the internationally popular UTF8 encoding, one Chinese character occupies 3 bytes. This article introduces you to a PHP function that intercepts UTF-8 format strings.

Example:

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 ( ord ( substr ( $string, $i, 1 ) ) ), 8, &#39;0&#39;, STR_PAD_LEFT ), &#39;0&#39; )) {
  if ($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 ( $result, ENT_QUOTES, &#39;UTF-8&#39; );
 if ($i < $strlen) {
 $result .= $etc;
 }
 return $result;
}

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

<?php
  $str="如果需要截取utf-8格式的字符串，直接调用这个函数即可。";
  echo truncate_utf8_string($str,10);//输出结果：如果需要截取utf-8格...
?>

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