evaluate string with array php

Question

I have a string like

       "subscription link   :%list:subscription%
       unsubscription link :%list:unsubscription%
       ------- etc"

AND

I have an array like

    $variables['list']['subscription']='example.com/sub';
    $variables['list']['unsubscription']='example.com/unsub';
    ----------etc.

I need to replace %list:subscription% with $variables['list']['subscription'],And so on here list is first index and subscription is the second index from $variable .Is possible to use eval() for this? I don't have any idea to do this,please help me

Mihai Stancu · Accepted Answer · 2014-03-01 09:35:32Z

2

Str replace should work for most cases:

foreach($variables as $key_l1 => $value_l1)
    foreach($value_l1 as $key_l2 => $value_l2)
        $string = str_replace('%'.$key_l1.':'.$key_l2.'%', $value_l2, $string);

Eval forks a new PHP process which is resource intensive -- so unless you've got some serious work cut out for eval it's going to slow you down.

Besides the speed issue, evals can also be exploited if the origin of the code comes from the public users.

answered Mar 1, 2014 at 9:35

Mihai Stancu

16.2k2 gold badges35 silver badges51 bronze badges

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

Comments

user3290080 · Accepted Answer · 2014-03-01 09:58:01Z

0

You could write the string to a file, enclosing the string in a function definition within the file, and give the file a .php extension.

Then you include the php file in your current module and call the function which will return the array.

answered Mar 1, 2014 at 9:58

user3290080

191 bronze badge

Comments

Community · Accepted Answer · 2023-11-17 19:29:57Z

0

I would use regular expression and do it like that:

$stringWithLinks = "";
$variables = array();

// your link pattern, in this case
// the i in the end makes it case insensitive
$pattern = '/%([a-z]+):([a-z]+)%/i';

$matches = array();

// https://www.php.net/manual/en/function.preg-replace-callback.php
$stringWithReplacedMarkers = preg_replace_callback(
    $pattern, 
    function($mathces) {
        // important fact: $matches[0] contains the whole matched string
        return $variables[$mathces[1]][$mathces[2]];
    }, 
    $stringWithLinks);

You can obviously write the pattern right inside, I simply want to make it clearer. Check PHP manual for more regular expression possibilities. The method I used is here:

https://www.php.net/manual/en/function.preg-replace-callback.php

edited Nov 17, 2023 at 19:29

CommunityBot

11 silver badge

answered Mar 1, 2014 at 10:02

Santhos

3,5285 gold badges33 silver badges49 bronze badges

Collectives™ on Stack Overflow

evaluate string with array php

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related