PHP regex replace from data array

Question

I have a template string like this

$myStr ="<font face=\"#3#\" size=\"6\">TEST STRING</font>";

And an array of fonts like this

$fontList = array(
    0 => "ubuntumono",
    1 => "opensans",
    2 => "opensanscondensed",
    3 => 'opensanslight',
    4 => 'exo2',
    5 => 'exo2light'
);

Now I want to check my string for face=\"#3#\" (3 is the index of font in $fontList)

and replace it with face=\"opensanslight\"

How can I do it with Regex & PHP? Thank you.

score 3 · Accepted Answer · 2014-02-10 13:01:52Z

3

Assuming PHP 5.3.0 or better:

$myStr = preg_replace_callback('/#(\d+)#/', function ($matches) use ($fontList) {
    return $fontList[$matches[1]];
}, $myStr);

Example

If you want to only change #number# when it is surrounded by quotes:

$myStr = preg_replace_callback('/"#(\d+)#"/', function ($matches) use ($fontList) {
    return '"' . $fontList[$matches[1]] . '"';
}, $myStr);

Example

edited Feb 10, 2014 at 13:01

answered Feb 10, 2014 at 12:43

user21926

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6 Comments

zzlalani Over a year ago

the index in $matches should be zero? if i'm not wrong

user21926 Over a year ago

No. $matches[0] would be #3#. $matches[1] would be 3.

zzlalani Over a year ago

ohh ok. nice answer (Y)

user3253797 Over a year ago

Thank you @Sean Bright for your rapid reply but I want to ask something more. I guess this solution will also change other parts of the string Ex: <font face=\"#3#\" size=\"6\">TEST #114# another occurence</font>.How can I solve this problem. By the way $fontList array may have more than 100 fonts. Thank you.

user21926 Over a year ago

@user3253797: I made an edit that will make it only match when surrounded by quotes. Does that satisfy your needs?

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