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PHP substring without breaking words

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  1. /*  
  2.     snippet(phrase,[max length],[phrase tail])
  3.     snippetgreedy(phrase,[max length before next space],[phrase tail])
  4.  
  5. */
  6.  
  7. function snippet($text,$length=64,$tail="...") {
  8.     $text = trim($text);
  9.     $txtl = strlen($text);
  10.     if($txtl > $length) {
  11.         for($i=1;$text[$length-$i]!=" ";$i++) {
  12.             if($i == $length) {
  13.                 return substr($text,0,$length) . $tail;
  14.             }
  15.         }
  16.         $text = substr($text,0,$length-$i+1) . $tail;
  17.     }
  18.     return $text;
  19. }
  20.  
  21. // It behaves greedy, gets length characters ore goes for more
  22.  
  23. function snippetgreedy($text,$length=64,$tail="...") {
  24.     $text = trim($text);
  25.     if(strlen($text) > $length) {
  26.         for($i=0;$text[$length+$i]!=" ";$i++) {
  27.             if(!$text[$length+$i]) {
  28.                 return $text;
  29.             }
  30.         }
  31.         $text = substr($text,0,$length+$i) . $tail;
  32.     }
  33.     return $text;
  34. }
  35.  
  36. // The same as the snippet but removing latest low punctuation chars,
  37. // if they exist (dots and commas). It performs a later suffixal trim of spaces
  38.  
  39. function snippetwop($text,$length=64,$tail="...") {
  40.     $text = trim($text);
  41.     $txtl = strlen($text);
  42.     if($txtl > $length) {
  43.         for($i=1;$text[$length-$i]!=" ";$i++) {
  44.             if($i == $length) {
  45.                 return substr($text,0,$length) . $tail;
  46.             }
  47.         }
  48.         for(;$text[$length-$i]=="," || $text[$length-$i]=="." || $text[$length-$i]==" ";$i++) {;}
  49.         $text = substr($text,0,$length-$i+1) . $tail;
  50.     }
  51.     return $text;
  52. }
  53.  
  54. /*
  55. echo(snippet("this is not too long to run on the column on the left, perhaps, or perhaps yes, no idea") . "<br>");
  56. echo(snippetwop("this is not too long to run on the column on the left, perhaps, or perhaps yes, no idea") . "<br>");
  57. echo(snippetgreedy("this is not too long to run on the column on the left, perhaps, or perhaps yes, no idea"));
  58. */

URL: http://us.php.net/substr

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