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PHP - Preg_replace() make replacement with array value

Posted on 2011-02-17
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Last Modified: 2012-05-11
Hello Experts

I am trying to do another reg_exp thing

I have an array....

  array['red food']=>"apples";
  array['yellow food']=>"bananas";  
  array['green food']=>"peas";
 
and an input string....

  $string = "i like <like=\"yellow food\"> and i like <like=\"green food\">";
 
  The replacement is done so that the output reads...
 
  i like bananas amd i like peas

I have been trying to do this in one line in the preg_replace() but i dont seem to be able to do it correctly.
Does anyone have ideas or will i have to do it in two stages...


thanks
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Question by:handypam
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4 Comments
 
LVL 9

Expert Comment

by:AriMc
ID: 34922308
You didn't provide any code as an example of how you are trying to do it. That would really help.

0
 
LVL 35

Expert Comment

by:Terry Woods
ID: 34922377
$my_array['red food']="apples";
$my_array['yellow food']="bananas";
$my_array['green food']="peas";

$string = "i like <like=\"yellow food\"> and i like <like=\"green food\">";

print preg_replace('/<like="([^"]*)">/e', "\$my_array['$1']", $string);

Result:
i like bananas and i like peas
0
 
LVL 35

Accepted Solution

by:
Terry Woods earned 250 total points
ID: 34922403
Note that to prevent values like "purple food" being swapped with a blank, you might need to tighten the pattern up like this:

$my_array['red food']="apples";
$my_array['yellow food']="bananas";
$my_array['green food']="peas";

$string = "i like <like=\"yellow food\"> and i like <like=\"green food\">, but not so much <lik
e=\"purple food\">\n";

$pattern = '/<like="('.implode("|",array_keys($my_array)).')">/e';
print preg_replace($pattern, "\$my_array['$1']", $string);

Result:
i like bananas and i like peas, but not so much <like="purple food">
0
 

Author Closing Comment

by:handypam
ID: 34922485
thank you so much
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