Changing ereg_replace to equivalent preg_replace

Question

Possible Duplicates:
How can I convert ereg expressions to preg in PHP?

What is the equivalent using preg_replace to the following expression?

ereg_replace('^' . $g_lang_prefix, '', $t_var );

Most important difference: PCRE need [delimiters](http://php.net/manual/en/regexp.reference.delimiters.php). — Felix Kling, Jun 07 '11 at 18:13

dynamic · Accepted Answer · 2011-06-07T18:15:32.637

5

preg_replace('/^' . preg_quote($g_lang_prefix,'/') . '/', '', $t_var );

If you need $g_lang_prefix working as a common regex then omit preg_quote

preg_replace('/^' . $g_lang_prefix . '/', '', $t_var );

(quite obvious)

Also if you need this second solution, but your $g_lang can contain even this char / then you need to escape at least it:

preg_replace('/^' . str_replace('/','\/',$g_lang_prefix) . '/', '', $t_var );

edited Jun 07 '11 at 18:15

answered Jun 07 '11 at 18:10

dynamic

4

+1 for using preg_quote. – anubhava Jun 07 '11 at 18:11
I had to, consdering I didn't know what `$g_lang_prefix` could be :) – dynamic Jun 07 '11 at 18:13
Maybe `$g_lang_prefix` is supposed to contain a regex for the prefix. – salathe Jun 07 '11 at 18:13
@yes Thanks, this `preg_replace('/^' . preg_quote($g_lang_prefix,'/') . '/', '', $t_var );` worked very well! – RedDragon Jun 07 '11 at 18:26
@salathe: can you explain why that -1 ? – dynamic Jun 07 '11 at 18:29

1 Answers1