Converting Perl Regex to PHP [closed]

manpreet Best Answer 2 years ago

I have the following Regex in PERL which I need to convert to PHP

if($line =~ m/[<]div class="row.* id="(vm_[0-9]{8,9})"[>]/i){ }

I currently have the following in PHP to match it, but I'm not getting the same results:

preg_grep('/[<]div class="row(.*) id="(vm_[0-9]{8,9})"[>]/', $lines);

Can anyone tell me if what I have is the same or if I'm mistaken?

manpreet 2 years ago

preg_grep returns an array whereas if you use preg_match, you get a boolean. So if you are using:

if($line =~ m/[<]div class="row.* id="(vm_[0-9]{8,9})"[>]/i){ }

It would be an equivalent for:

if(preg_match('/[<]div class="row(.*) id="(vm_[0-9]{8,9})"[>]/i', $line)) { };

Though you can simplify the regex a bit:

if(preg_match('/<div class="row(.*) id="(vm_[0-9]{8,9})">/i', $line)) { };

If you want to see the matches, you could do:

if(preg_match('/<div class="row(.*) id="(vm_[0-9]{8,9})">/i', $line, $match)) {
    print_r($match);
};

manpreet 2 years ago

preg_grep returns an array whereas if you use preg_match, you get a boolean. So if you are using:

if($line =~ m/[<]div class="row.* id="(vm_[0-9]{8,9})"[>]/i){ }

It would be an equivalent for:

if(preg_match('/[<]div class="row(.*) id="(vm_[0-9]{8,9})"[>]/i', $line)) { };

Though you can simplify the regex a bit:

if(preg_match('/
id="(vm_[0-9]{8,9})">/i', $line)) { };

If you want to see the matches, you could do:

if(preg_match('/
id="(vm_[0-9]{8,9})">/i', $line, $match)) {
    print_r($match);
};

manpreet 2 years ago

preg_grep returns an array whereas if you use preg_match, you get a boolean. So if you are using:

if($line =~ m/[<]div class="row.* id="(vm_[0-9]{8,9})"[>]/i){ }

It would be an equivalent for:

if(preg_match('/[<]div class="row(.*) id="(vm_[0-9]{8,9})"[>]/i', $line)) { };

Though you can simplify the regex a bit:

if(preg_match('/<div class="row(.*) id="(vm_[0-9]{8,9})">/i', $line)) { };

If you want to see the matches, you could do:

if(preg_match('/<div class="row(.*) id="(vm_[0-9]{8,9})">/i', $line, $match)) {
    print_r($match);
};