PHP string intercept function usage detailed

The

substr () is a function of a truncated string that PHP can only handle in English, numbers, but not the Chinese mix, so if you need to intercept the Chinese mixed string, you can refer to the second code.

code is as follows

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//construction string   $STR = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";   echo "original string:". $str. " ";  //interception in various ways   $STR 1 = substr ($STR, 5);   echo "begins with the 5th character to the last:". $str 1. " ";   $STR 2 = substr ($str, 9,4);   Echo takes 4 characters starting from the 9th character: ". $str 2." ";   $STR 3 = substr ($str,-5);   Echo takes the penultimate 5 characters: ". $str 3." ";   $STR 4 = substr ($str, -8,4);   Echo takes 4 characters backwards from the penultimate character: ". $str 4." ";   $STR 5 = substr ($str, -8,-2);   Echo begins with the last 8th character until the penultimate character: ". $str 5." "; Run code to copy code save code

/*
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Parameters:
$str _cut A string that needs to be truncated
$length maximum length allowed for string display

Program function: Intercept all corners and half-width (Chinese and English) mixed strings to avoid garbled
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*/

code is as follows	copy code
function Substr_cut ($str _cut, $length) {     if (strlen ($str _cut) > $length)     {         for ($i =0; $i < $length; $i + +)          if (Ord ($str _cut[$i]) > 128)     $i + +;         $str _cut = substr ($str _cut,0, $i). ".";    }     return $str _cut; }