Reputation: 761
I have an addition to url e.g. /products/myproduct/?v=iphone-x/transparent/*/Green
So what I need is for wordpress to add the ?v=iphone-x/transparent/*/Green to all links on the page (only '<a href="">
's, no 'img src=""
' or others)
I have managed to do that, but it's a little "dirty". Is there any neat function to add the parameter to all links?
The code I have is as follows:
function callback($buffer) {
// modify buffer here, and then return the updated code
$temp = explode('href="', $buffer);
$buffer = $temp[0];
array_shift($temp);
foreach($temp as $t){
$tt = explode('"', $t, 2);
$buffer .= 'href="'.$tt[0].'?v='.$_GET['v'].'"'.$tt[1];
}
return $buffer;
}
function buffer_start() { ob_start("callback"); }
function buffer_end() { ob_end_flush(); }
add_action('wp_head', 'buffer_start');
add_action('wp_footer', 'buffer_end');
Upvotes: 0
Views: 193
Reputation: 11437
One way you can achieve this is to hook into "the_content" filter. By using regexp with preg_replace_callback function you can get decent results.
function add_para( $content ) {
$content = preg_replace_callback(
"/href=(?>'|\")([^\"']+)(?>'|\")/",
function($m) {
print_r($m);
return "href='".$m[1]."/additional-param'";
},
$content);
return $content;
}
add_filter( 'the_content', 'add_para', 0 );
However, you might run into some issues particularly if your content is not formatted probably (extra spaces, missing tags .. etc).
So the alternative is either to us a JS approach (jQuery for example), or using PHP DOM parser like: PHP Simple HTML DOM Parser
Upvotes: 1