Replace wrong bbcode color regex php

Question

I have some problems to do a regex....

I would like to replace wrong bbcode color by a default bbcode.

[color=#123456]  => OK
[color=#]        => KO
[color=]         => KO
[color=#1234567] => KO
[color=#12345]   => KO

I started to do something but I don't understand how doing multiple tests in a regex and how match just after the = with differents mix

For exemple :

101regex

Thanks a lot for your help :)

Please post your regex in the question and not in a link

Machavity
– Machavity ♦

2015-04-10 15:45:08 +00:00
Commented Apr 10, 2015 at 15:45 — Machavity
– Machavity ♦, Commented Apr 10, 2015 at 15:45
Sorry, I'm new in stackoverfow.

sylvain
– sylvain

2015-04-10 15:58:11 +00:00
Commented Apr 10, 2015 at 15:58 — sylvain
– sylvain, Commented Apr 10, 2015 at 15:58

Med · Accepted Answer · 2015-04-10 15:46:48Z

1

You have to matche correct color pattern, and put default color when pattern is not matched.

$color = '[color=toto]';
$default_color = '[color=#123456]';
$correct_pattern = '/\[color=#\d{6}\]/';

if(!preg_match($correct_pattern, $color, $matches)) {
    $color = $default_color;
}

echo $color;

This code will output

[color=#123456]

If you need explanation on the regExp i can explain it on the comment

answered Apr 10, 2015 at 15:46

Med

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3 Comments

Med Over a year ago

BTW, if you need to use Hexa colors, and not only decimal colors, you will have to replace the "\d" in the regExp by "[0-9A-F]"

sylvain Over a year ago

first thank for your rapidity, Unfortunately, I must replacing in complexe text. I can't match one per one all the bbcode code.

Med Over a year ago

So you can use only the regExp '/[color=#\d{6}]/' or '/[color=#[0-9A-F]{6}]/' depending on your need

Answers_Seeker · Accepted Answer · 2015-04-10 16:00:43Z

0

I would like to complete his pattern by including the hexa case and /i argument for the regex, making the pattern:

$pattern = "/\[color=#[0-9a-f]{6}\]/i";

edit: @sylvain: "I must replacing in complexe text. I can't match one per one all the bbcode code"

Go for preg_replace then.

edited Apr 10, 2015 at 16:00

answered Apr 10, 2015 at 15:57

Answers_Seeker

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3 Comments

Med Over a year ago

Yeah i was wondering too, maybe "/[color=#[0-9A-Fa-f]{6}]/i" with Upper Case letter be good too

sylvain Over a year ago

I would like the opposite :p , I need to remplace all the wrong bbcode and not match the good one.

Answers_Seeker Over a year ago

Use negative look arounds then : stackoverflow.com/questions/2637675/…

sylvain · Accepted Answer · 2015-05-18 12:54:36Z

0

Arh .. I seen the ambiguity of my question .....

I would like the wrong bbcode is match by the regex. In fact all the KO item will be replace after = by #000000

 [color=#123456]  => KO
 [color=#]        => matched
 [color=]         => matched
 [color=#1234567] => matched
 [color=#12345]   => matched
 [color=lightgray]   => matched

edited May 18, 2015 at 12:54

answered Apr 13, 2015 at 8:45

sylvain

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