str_replace("'","\'",$string) takes also ? to \'

[sascha]

hello,

i have aproblem with as replsace in a script that should support utf-8 (it is encodedf and saved in) and multibyte chars ... but i dont know if this is the prolbem right now

str_replace("'","\'",$string) // i wanne replace a single quotation with an escape

but it even replaces questionmarks .... seems hex dont work either

any idea how to get only the single quotation???