How to escape regex special characters from array using php to use in javascript

Question

I have an array that also contains regex special characters in its some values, I want to implode() it so that special characters in its some values escape using preg_quote()

Here is what I tried

$arr = array("+1", "1+4"); 
echo implode("|", $arr);

I want escaped output like this

\+1|1\+4|

You did not research this, as any reasonable search on the internet would have pointed you to the right method. — trincot, Feb 05 '18 at 08:06
There is another way too `"\Q" . implode("\E|\Q", $arr) . "\E"` — revo, Feb 05 '18 at 08:16
See https://stackoverflow.com/questions/1531456/is-there-a-php-function-that-can-escape-regex-patterns-before-they-are-applied — Jan, Feb 05 '18 at 08:17

Syscall · Accepted Answer · 2018-02-05T08:11:05.503

4

You could use array_map() with preg_quote() like this :

$arr = array("+1", "1+4"); 
echo implode("|", array_map('preg_quote', $arr));

Outputs :

\+1|1\+4

To get the final pipe :

$arr = array("+1", "1+4" , ""); 
echo implode("|", array_map('preg_quote', $arr)) ;
// Or
$arr = array("+1", "1+4"); 
echo implode("|", array_map('preg_quote', $arr)) . "|" ;

Outputs :

\+1|1\+4|

edited Feb 05 '18 at 08:11

answered Feb 05 '18 at 08:05

Syscall

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How to escape regex special characters from array using php to use in javascript

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