PHP interception Chinese string function example_PHP tutorial

//Chinese string interception
function substr_zh($string,$sublen,$start=0,$code='UTF-8'){
if($code=='UTF-8'){
$pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]| xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/";
preg_match_all($pa,$string,$t_string);
if(count($t_string[0])-$start > $sublen){
return join('',array_slice($t_string[0],$start,$sublen))."...";
//array_slice() takes out a segment of value in the array based on conditions, parameters (array, starting position, [length])
}else{
return join('',array_slice($t_string[0],$start,$sublen));
}
}else{
$start = $start*2;
$sublen = $sublen*2;
$strlen = strlen($string);
$tmpstr = '';
for($i=0;$i<$strlen;$i++){
if($i>$start && $i<($start+$sublen)){
if(ord(substr($string,$i,1))>129){
//ord(): Returns the ASCII value of the first character of the string
//substr(): Returns a part of the string
$tmpstr .= substr($string,$i,2);
}else{
$tmpstr .= substr($string,$i,1);
}
}
if(ord(substr($string,$i,1))>129){
$i++;
}
if(strlen($tmpstr)<$strlen){
$tmpstr .= "...";
}
}
return $tmpstr;
}
}
$string ="The overhead car jacks up the dilemma. The Shanghai Association is afraid of the Wizards and is willing to be trapped. The right foot is cute.";
echo substr_zh($string,10,0,'gb2312');
?>

I hope this article will be helpful to everyone’s PHP programming design.