Regex - Pattern to Replace a HTML tag with specified attribute value

Question

i'm using PHP and i want to check the following tags: iframe and script

I want that if they contains X value in the src attribute to add a Y class to the tag and change src attribute name to data-src.

ex.

$blacklist = array("google.com/plus.js", "google.com/drive.js");
$myclass = "blocked";

$html = '<script src="http://google.com/plus.js"></script>';

foreach($blacklist as $black)
{
    $html = preg_replace(...);
}

/* now $html must be: "<script data-src="google.com/plus.js" class="blocked"></script> */

Anyone can help me with this Regex operation?

I would recommend using a combination of DOMDocument and XPath for this and not regex. Also the answers to this question may help you — segFault
– segFault, Commented Dec 30, 2015 at 15:36
@sebastianForsberg, i think that 1 regex is fastest than DOMDocument — Vasile Alexandru Peste
– Vasile Alexandru Peste, Commented Dec 30, 2015 at 15:39
Well regex can be unreliable for HTML parsing, this depends on your needs and the type of input you are going to be passing to your script(s). See the answer to this question for more details... — segFault
– segFault, Commented Dec 30, 2015 at 15:42
Also, what have you tried so far? Your code snippet indicates you have not tried any regex patterns yet. If you haven't even attempted a regular expression that is where you should start if that is the route you are going to take. I have used this tool in the past for regex testing. — segFault
– segFault, Commented Dec 30, 2015 at 15:46
@VasileAlexandruPeste it doesn't matter if regex are faster if they are incorrect. See htmlparsing.com/regexes.html for examples of why this problem is harder than you might originally suspect. Additionally, if you even make a regular expression robust enough to handle all these cases (and more) it very, very quickly becomes unmaintainable. — d0nut
– d0nut, Commented Dec 30, 2015 at 16:29

Mr.kang · Accepted Answer · 2015-12-30 16:35:09Z

1

I want to help.

To search with regex in the vim.

To substitute with regex in the vim.

answered Dec 30, 2015 at 16:35

Mr.kang

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