Find text in string in PHP

[Gatete]

This should be pretty straightforward, but I can't seem to find an explanation anywhere on how to do it.I have a string in PHP. That string might contain within it somewhere the substring ":ERROR:". I need to find if it has that string. \[code\]strpos()\[/code\] has worked perfectly up to this point, until today when ":ERROR:" was the first item in the string, so \[code\]strpos()\[/code\] returned \[code\]0\[/code\], so the program kept running thinking it had no error.I don't need to replace the string, or do any manipulation to it, I just need a simple \[code\]true/false\[/code\] answer to "does :ERROR: exist in the string?"