CODEWITHSUNDEEP
javascriptphp
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Reputation: 2625

Translate javascript string replace function to php

I found in this site a very basic javascript function to encode text. Looking at the source code this is the string replacement code:

txtEscape = txtEscape.replace(/%/g,'@');

So the string stackoverflow becomes @73@74@61@63@6B@6F@76@65@72@66@6C@6F@77

I need a function that does the same elementary encryption in php, but I really don't understand what the /%/g does. I think in php the same function would be something like:

str_replace(/%/g,"@","stackoverflow");

But of course the /%/g doesn't work

Upvotes: 1

Views: 978

Answers (1)

Georges O.
Georges O.

Reputation: 992

Replace a character

Indeed, the PHP function is str_replace (there are many functions for replacements). But, the regex expression is not the same :)

See official documentation: http://php.net/manual/en/function.str-replace.php

In your case, you want to replace a letter % by @.

g is a regex flag. And // are delimiter to activate the regex mode :)

The "g" flag indicates that the regular expression should be tested against all possible matches in a string. Without the g flag, it'll only test for the first.

<?php
echo str_replace('%', '@', '%73%74%61%63%6B%6F%76%65%72%66%6C%6F%77');
?>

In PHP, you can use flags with regex: preg_replace & cie.

Escape

See this post: PHP equivalent for javascript escape/unescape There are two functions stringToHex and hexToString to do what you want :)

Indeed, the site you provided use espace function to code the message:

document.write(unescape(str.replace(/@/g,'%')));

Upvotes: 1

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