Geting two matches in a string using a regular expression

Question

My string:

fields[name_1]

I want to get fields and name_1 using regex.

I'm know about preg_match_all(), but I'm not friends with regular expressions.

Such a banal question around Regular Expressions, gets some up-voted answers. Something's wrong. — revo, Jul 27 '17 at 09:51
https://stackoverflow.com/questions/8935717/php-regular-expression-string-from-inside-brackets — revo, Jul 27 '17 at 09:54

Thamilhan · Accepted Answer · 2017-07-27T10:19:50.207

3

This can be used for direct match:

$string = 'fields[name_1]';

preg_match('/(.+)\[(.+)\]/', $string, $matches);

print_r($matches);

You get:

Array
(
    [0] => fields[name_1]
    [1] => fields
    [2] => name_1
)

So, $matches[1] and $matches[2] are what you needed.

Still I am unclear about your exact need!

Here are the explanation for the Regex:

edited Jul 27 '17 at 10:19

answered Jul 27 '17 at 09:44

Thamilhan

thx. You were the first, so your answer will be marked as true. – Stanislav Belichenko Jul 27 '17 at 09:48
1

You might want to use `+` instead of `*`. Currently your regex will match a simple `[]` with both groups empty. [Compare here](https://regex101.com/r/PcJzQL/2). I know you are not using global flag, but if there were more matches in string it would be safer to use the plus sign for quantifier. – Asunez Jul 27 '17 at 10:10
@StanislavBelichenko - you might want to consider my comment above. – Asunez Jul 27 '17 at 10:12
@Asunez Thanks modified! – Thamilhan Jul 27 '17 at 10:20

score 2 · Answer 2 · answered Jul 27 '17 at 09:44

2

THere are uncounted examples for this alone here on SO. A simple search would have shown you what you need. Anyway, to get you going:

<?php
$subject = 'fields[name_1]';
preg_match('/^(.+)\[(.+)]$/', $subject, $tokens);
print_r($tokens);

The output of that obviously is:

Array
(
    [0] => fields[name_1]
    [1] => fields
    [2] => name_1
)

answered Jul 27 '17 at 09:44

arkascha

thx. My English is too bad for right search this exaples, sorry. – Stanislav Belichenko Jul 27 '17 at 09:45
1

@StanislavBelichenko Then start reading the official documentation of the php functions you want to use. They are of good quality, come with helpful examples and are translated in many languages: http://php.net/manual/en/function.preg-match.php – arkascha Jul 27 '17 at 09:47
You are right, I did not think at all that there could be a similar example. – Stanislav Belichenko Jul 27 '17 at 09:49
1

If you knew that there are thousands of examples around this topic on SO then wouldn't it be better if you voted this question to be closed as a duplicate instead of posting an answer? – revo Jul 27 '17 at 09:56

2 Answers2