I need help with preg_replace function

Hanchan · June 13, 2014, 6:33am

Good day phphelp,

I am currently studying preg_replace function

below are my code

index.html
[php]

Age:
Language:
[/php]

check.php
[php]<?php

$age=$_POST[‘age’];
$language=$_POST[‘language’];

$reference=array();
$reference[0]="/age/";
$reference[1]="/language/";

$replace=array();
$replace[0]=$age;
$replace[1]=$language;

$text = <<< heredoc

Age	age
Language	language

heredoc;

echo preg_replace($reference,$replace,$text);

?>[/php]

Input

Age: 12
Language: English

Output

Age 12
Langu12 langu12

My problem is the text “age” in “language” is also replaced by the input of what is being input in the text field “age”…

so how can I only replace the word “age”?? not including the “age” in “language”?

Thanks and regards

Topcoder · June 13, 2014, 3:54pm

You have to do a Word boundarys “\b” and I would also do case insenstivity “i”

Change This:
[php]echo preg_replace($reference,$replace,$text);[/php]

To:
[php]echo preg_replace("/\b" . $reference . “\b/i”,$replace,$text);[/php]

See the difference?

You can read about it here:

Hanchan · June 16, 2014, 1:03am

Thanks Topcoder! it worked, I was also looking for the list of regex