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run code in 200+ php & hhvm versions
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<?php $regex = '[^a]*a\\{'; $test_string = 'AAAAAAAAAAAAAA{AA'; echo "1:".mb_ereg_replace('/'.$regex.'/','WORKED',$test_string)."\n"; echo "2:".preg_replace('/'.$regex.'/u','WORKED',$test_string)."\n"; echo "3:".preg_replace('/'.$regex.'/','WORKED',$test_string)."\n";
Output for 4.3.4 - 7.2.0
1:AAAAAAAAAAAAAA{AA 2:AAAAAAAAAAAAAA{AA 3:AAAAAAAAAAAAAA{AA
Output for 4.3.2 - 4.3.3
Fatal error: Call to undefined function: mb_ereg_replace() in /in/gtZL5 on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: mb_ereg_replace() in /in/gtZL5 on line 4