Question

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php preg_replace \

I am trying to replace all occurances of the “\” character with “_c” using preg_replace.

Here is some code I have tried:

$outputStr=preg_replace('/\/','_c',$inputStr);
$outputStr=preg_replace('/\\/','_c',$inputStr);

But the $outputStr ends up as NULL in both cases. What is the correct regular expression to get the “\” character?

Answer 1

You need to escape the slash in your string and your regex:

To use backslash in replacement, it must be doubled ("\\\\" PHP string).

See http://de3.php.net/preg_replace. e.g.

$outputStr = preg_replace('/\\\\/','_c',$inputStr);