PHP string Intercept Length customization method

Let's take a look at how to use PHP custom functions to intercept the length of the character we want to intercept, beyond the ellipsis to replace or hide it.

String Truncation Method:

//intercept string length function cut ($Str, $Length, $more =true) {//$STR to intercept string, $    Length is the global $s that needs to be intercepted;    $i = 0;    $l = 0;    $ll = strlen ($STR);    $s = $Str;    $f = true;        while ($i <= $ll) {if (ord ($Str {$i}) < 0x80) {$l + +; $i + +;        } else if (Ord ($Str {$i}) < 0xe0) {$l + +; $i + = 2;        } else if (Ord ($Str {$i}) < 0xf0) {$l + = 2; $i + = 3;        } else if (Ord ($Str {$i}) < 0xf8) {$l + = 1; $i + = 4;        } else if (Ord ($Str {$i}) < 0XFC) {$l + = 1; $i + = 5;        } else if (Ord ($Str {$i}) < 0xFE) {$l + = 1; $i + = 6;            } if (($l >= $Length-1) && $f) {$s = substr ($Str, 0, $i);        $f = false; } if (($l > $Length) && ($i < $ll) && $more) {$s = $s.             '...';             Break    If intercepted, the end of the string is appended with the ellipsis "..."} } return $s;} 
 

How to use:

$str = ' Take a look at where to intercept? '; Echo Cut ($STR, 1); Echo '
'; Echo Cut ($STR, 4); Echo '
'; Echo Cut ($str, 5); Echo '
'; Echo Cut ($str, 5,false); Echo '
'; $str = ' Mix English and Chinese to see hello? '; Echo Cut ($STR), Echo '
'; Echo Cut ($STR, 50);

Output:

See... Look... Look... Look at the mix of Chinese and English to see Hel ... A mix of Chinese and English look hello?

Explanation: The general UTF-8 format is 3 bytes, while GBK compatible gb2312 is generally 2 bytes, the above is UTF-8 encoded as an instance.

The third parameter, $more, allows you to toggle the ellipsis pattern, which is true with an ellipsis and false to no ellipsis.

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