Online PHP editor | perf for 8tBjl

@ 2013-05-16T08:43:48Z

<?php



class Html{

  protected
    $reachedLimit = false,
    $totalLen     = 0,
    $maxLen       = 25;

  public static function trim($html, $maxLen = 25){

    $dom = new DomDocument();
    $dom->loadHTML($html);

    
    $html = new static();
    $html->walk($dom, $maxLen);

    // remove wrapper tags added by DD (doctype, html...)
    // http://stackoverflow.com/a/6953808/1058140
    $dom->removeChild($dom->firstChild);            
    $dom->replaceChild($dom->firstChild->firstChild->firstChild, $dom->firstChild);
  
    return $dom->saveHTML();
  }

  protected function walk(DomNode $node, $maxLen){

    // remove any nodes that passed our limit
    if($this->reachedLimit){
      $node->parentNode->removeChild($node);
      return;
    }  

    // only text nodes should have text,
    // so do the splitting here
    if($node instanceof DomText){      
      $this->totalLen += $nodeLen = strlen($node->nodeValue);

      if($this->totalLen > $maxLen){
        $node->nodeValue = substr($node->nodeValue, 0, $nodeLen - ($this->totalLen - $maxLen));
        $this->reachedLimit = true;
      }

    }

    if(!$node->hasChildNodes())
      return;

    // if node has children, walk its child elements 
    foreach($node->childNodes as $child)
      $this->walk($child, $maxLen);    
  }


}




print html::trim('<p>I can haz <strong> html trim </strong>, 14);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
5.4.15	0.021	0.048	12.39
5.4.14	0.013	0.043	12.08
5.4.13	0.016	0.039	12.06
5.4.12	0.019	0.056	12.03
5.4.11	0.015	0.038	12.02
5.4.10	0.011	0.042	12.02
5.4.9	0.019	0.046	12.02
5.4.8	0.011	0.043	12.02
5.4.7	0.012	0.041	12.02
5.4.6	0.011	0.041	12.02
5.4.5	0.018	0.055	12.02
5.4.4	0.015	0.049	12.01
5.4.3	0.013	0.042	12.00
5.4.2	0.011	0.050	12.00
5.4.1	0.011	0.042	12.00
5.4.0	0.015	0.047	11.50
5.3.25	0.012	0.038	12.72
5.3.24	0.011	0.044	12.72
5.3.23	0.013	0.044	12.71
5.3.22	0.013	0.042	12.68
5.3.21	0.018	0.048	12.68
5.3.20	0.014	0.043	12.68
5.3.19	0.014	0.055	12.68
5.3.18	0.010	0.044	12.67
5.3.17	0.013	0.042	12.67
5.3.16	0.013	0.044	12.67
5.3.15	0.021	0.053	12.67
5.3.14	0.015	0.040	12.66
5.3.13	0.011	0.044	12.66
5.3.12	0.011	0.044	12.66
5.3.11	0.016	0.040	12.66
5.3.10	0.012	0.045	12.13
5.3.9	0.013	0.041	12.10
5.3.8	0.016	0.049	12.09
5.3.7	0.012	0.042	12.09
5.3.6	0.012	0.042	12.08
5.3.5	0.010	0.043	12.02
5.3.4	0.014	0.049	12.02
5.3.3	0.016	0.046	11.99
5.3.2	0.011	0.042	11.77
5.3.1	0.013	0.039	11.73
5.3.0	0.012	0.041	11.72

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