regular expression

Discussion in 'PHP' started by ssimon171078, Nov 3, 2014.

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  1. #1
    ssimon171078, Nov 3, 2014 IP
  2. Anveto

    Anveto Well-Known Member

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    #2
    You could find links with 
    <?php 
$regexp = "<a\s[^>]*href=(\"??)([^\" >]*?)\\1[^>]*>(.*)<\/a>";
    PHP:
    However I would recommend using xpath for parsing as it is much easier
    http://php.net/manual/en/class.domxpath.php
     
    Anveto, Nov 3, 2014 IP
  3. ROOFIS

    ROOFIS Well-Known Member

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    #3
    As an alternative to regex and dom there's also php's string position functions you could consider to. Try this for example;

    <?php
$subject = '10px;">
         <div class="post-title" style="margin: -5px 1px 2px 0px;"><h2><a href="https://www.tradebit.com/filedetail.php/276221757-local-marketing-goldrush">
           Local Marketing Goldrush</a></h2></div>
           <div style="line-height: 1.4em; font-size: 1.2em;">';

$start = strpos($subject,'a href="');         
$end = strpos($subject,'">',$start);
$output = substr(substr($subject, $start, $end - $start), 8);
echo $output;
?>
    PHP:

    You can apply simple math to extract the url this way, for multiple returns
    though you'd need to bundle code into a function and call via an array.

    .
     
    ROOFIS, Nov 14, 2014 IP
  4. sarahk

    sarahk iTamer Staff

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    #4
    Another alternative is to use DOMDocument which has a javascript feel about it. Where I was searching for 'img' you'd search for 'a' 
    
$document = new DOMDocument();
   libxml_use_internal_errors(true);
    $document->loadHTML($html_source);
    libxml_clear_errors();
$images = array();

foreach($document->getElementsByTagName('img') as $img) {
    $src = $img->getAttribute('src');
    if (!empty($src)) {
        $images[$src] = "<meta property='og:image' content='{$src}' />";
    }
}
    PHP:
     
    sarahk, Nov 14, 2014 IP