PHP: Find and replace with regex

Question

I have a variable which contains email addresses.

Examples:

    $email[1]="email(at)test.com";
    $email[2]="email[at]test.com";
    $email[3]="email(a)test.com";
    $email[4]="email(alfa)test.com";
    $email[5]="email[a]test.com";

How can I to perform in PHP a regex find all between () and [] and replace with "@". so in the end it will be like this:

    $email[1]="[email protected]";
    $email[2]="[email protected]";
    $email[3]="[email protected]";
    $email[4]="[email protected]";
    $email[5]="[email protected]";

All i have at the moment is this ((([a-zA-Z]+))|([[a-zA-Z]+]))

Avinash Raj · Accepted Answer · 2014-07-20 08:47:13Z

1

Regex:

[(\[][a-z]+[)\]]

Replacement string:

DEMO

Example:

<?php
$string = 'email(alfa)test.com';
$pattern = '~[(\[][a-z]+[)\]]~';
$replacement = '@';
echo preg_replace($pattern, $replacement, $string);
?> //=> [email protected]

edited Jul 20, 2014 at 8:47

answered Jul 20, 2014 at 8:41

Avinash Raj

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Comments

zx81 · Accepted Answer · 2014-07-20 08:45:48Z

1

Use this:

$replaced = preg_replace('~[([][^])]+[\])]~', '@', $yourstring);

Explanation

~[([] matches an opening bracket or brace
[^])]+ matches any chars that are not a closing bracket or brace
[\])] matches a closing bracket or brace
We replace with @

answered Jul 20, 2014 at 8:45

zx81

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1 Comment

zx81 Over a year ago

FYI, this simple solution will work regardless of what we have inside the braces: for instance, (a.t.) and [a-t] will also work.

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