使用php preg_replace自动链接joomla中的预定义单词的功能

Question

I am using Joomla/k2 component and I would like to automatically link certain keywords in articles. I did some research and came accross this function on http://coderzone.org/library/PHP-Auto-link-text-with-a-given-set-of_1085.htm

<?php 
// list of keywords to auto-link 
// list plural forms first
$reserved_word_list = array (

'dogs' => 'http://dogs.com', 
'dog' => 'http://dogs.com', 
'cat' => 'http://cats.com', 
'kitten' => 'http://cats.com',
'horse' => 'http://horses.com'
 }


// search text string and auto-link the words
foreach($reserved_word_list as $word => $rep_string){

if(strpos($some_text, $word)){

    // link the word
    $some_text = preg_replace('/(\s+)('.preg_quote($word).')/i','$1<a       href="'.$rep_string.'">$2</a>',$some_text);

    }
}    
?>

I pasted this function in my k2 template overide in joomla,just  above $this->item->maintext in item.php  and ended up with a blank page.

I am sure I have done something wrong but i cannot find out what it it!  Please take  a look at my code and see, thanks.

Answer 1

There are several syntax errors in the code you've pasted, which is probably why it's not doing anything. Try this:

// set the text here; I've put in some sample text.
$some_text =  "<p>My favourite animals are cats and dogs, but I can't stand horses -- they suck!</p>";

// list of keywords to auto-link
// list plural forms first
$reserved_word_list = array (
    'dogs' => 'http://dogs.com',
    'dog' => 'http://dogs.com',
    'cat' => 'http://cats.com',
    'kitten' => 'http://cats.com',
    'horse' => 'http://horses.com',
    'horses' => 'http://alltheprettyhorses.com'
);

// search text string and auto-link the words
foreach($reserved_word_list as $word => $rep_string){
    if(strpos($some_text, $word)){
    // link the word
        $some_text = preg_replace('/\b('.preg_quote($word).')\b/i','<a href="'.$rep_string.'">$1</a>',$some_text);
    }
}
echo $some_text;
// returns <p>My favourite animals are cats and <a href="http://dogs.com">dogs</a>,
// but I can't stand <a href="http://alltheprettyhorses.com">horses</a> -- they suck!</p>

You'll need to alter the code so that $some_text is set to the page contents.