Extracting URL from a link containing a specific string

I'd like to get address of certain links with desired text. Let's say I want to get links containing a word "BMW".

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 <a href="http://abc.com/xxxx">Dodge</a>

<a href="http://abc.com/a123.php">Used BMW card</a>

<a href="http://xyz.com/ferrari">Brand new Ferraris</a>

<a href="http://xyz.com/vjklj"><img src="pic.jpg" />Luxurious BMWs</a>

The link can only contain a text or a text and an image.

Is there any way how to do that without using regular expressions?

Aug 18 '11 #1

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✓ answered by milesmajefski

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<html>

<head><title>Find Links with BMW in them</title>

</head>

<body>

<?php
 
  $my_links = array();

  $example_links =

   '<a href="http://abc.com/xxxx">Dodge</a> 

    <a href="http://abc.com/a123.php">Used BMW card</a> 

    <a href="http://xyz.com/ferrari">Brand new Ferraris</a> 

    <a href="http://xyz.com/vjklj"><img src="pic.jpg" />Luxurious BMWs</a>';
 
  $my_pos = strpos($example_links, '<a');
 
  while ($my_pos !== False)

  {    

    $anchorBeg = strpos($example_links, '<a', $my_pos); 

    $anchorEnd = strpos($example_links, '/a>', $anchorBeg) + 2;

    $cut_length = $anchorEnd - $my_pos + 1;  

    $myStr = substr( $example_links, $anchorBeg, $cut_length );

    if (strpos($myStr, "BMW") !== False)
 
      $my_links[] = $myStr;
 
    $my_pos = strpos($example_links, '<a', $anchorEnd);

  }//end while
 
  //ouput

  $count = 0;

  foreach( $my_links as $str )

  {

    echo "<br />Link #$count: ";

    echo $str;

    $count++;

  }  

?>
 
</body>

</html>

2219

milesmajefski

Expand|Select|Wrap|Line Numbers

 
<html>

<head><title>Find Links with BMW in them</title>

</head>

<body>

<?php
 
  $my_links = array();

  $example_links =

   '<a href="http://abc.com/xxxx">Dodge</a> 

    <a href="http://abc.com/a123.php">Used BMW card</a> 

    <a href="http://xyz.com/ferrari">Brand new Ferraris</a> 

    <a href="http://xyz.com/vjklj"><img src="pic.jpg" />Luxurious BMWs</a>';
 
  $my_pos = strpos($example_links, '<a');
 
  while ($my_pos !== False)

  {    

    $anchorBeg = strpos($example_links, '<a', $my_pos); 

    $anchorEnd = strpos($example_links, '/a>', $anchorBeg) + 2;

    $cut_length = $anchorEnd - $my_pos + 1;  

    $myStr = substr( $example_links, $anchorBeg, $cut_length );

    if (strpos($myStr, "BMW") !== False)
 
      $my_links[] = $myStr;
 
    $my_pos = strpos($example_links, '<a', $anchorEnd);

  }//end while
 
  //ouput

  $count = 0;

  foreach( $my_links as $str )

  {

    echo "<br />Link #$count: ";

    echo $str;

    $count++;

  }  

?>
 
</body>

</html>

Aug 18 '11 #2

mike809

Thank you very much, I'm interested in parsing out the URLs only, so I'll probably do that the same way you did it with the A tags. That means finding >href="< and >"< and then use substr() function.

Aug 18 '11 #3

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