RegeX in PHP to capture string

Question

How do I get the following values in Regex from the following string

<tr><td>4 <td><b><a href="number.php?v=41a&k=53&t=102">3</a></b>

v = 41
k = 45
t = 102

I wanted only the number of each segment (v k t)

I tried this and got only one at a time

v=\d+

You want to extract those values individually or separately (3 regexs)? — gribvirus74
– gribvirus74, Commented Aug 11, 2017 at 14:39
If possible, in a single regex I wanted to extract the three — André
– André, Commented Aug 11, 2017 at 14:45
1) use DOMDocument/DOMXPath to extract the href value. 2) use parse_url to extract the query part of the url. 3) use parse_str to get the different values. — Casimir et Hippolyte
– Casimir et Hippolyte, Commented Aug 11, 2017 at 14:50

Toto · Accepted Answer · 2017-08-11 15:35:58Z

1

If your input string is really as simple as you said, you could use preg_match_all:

$str = '<tr><td>4 <td><b><a href="number.php?v=41a&k=53&t=102">3</a></b>';
preg_match_all('/(?<=[vkt]=)\d+/', $str, $m);
print_r($m[0]);

Output:

Array
(
    [0] => 41
    [1] => 53
    [2] => 102
)

answered Aug 11, 2017 at 15:35

Toto

91.7k63 gold badges97 silver badges135 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Better than I imagined

@André: Because it's a feature of preg_match_all, it isn't only a regex.

gribvirus74 · Accepted Answer · 2017-08-11 14:43:56Z

0

Use positive lookbehind for each letter:

(?<=v=)\d+
(?<=k=)\d+
(?<=t=)\d+

answered Aug 11, 2017 at 14:43

gribvirus74

7676 silver badges21 bronze badges

Because each regex is for different value, when you concatenate them, they will be useless.

@André: regexr support only javascript regexes and lookbehind is not supported by javascript regexes.

Well, it's actually a matter of opinion but generally regex101 is good.