Note that php.net answer (official docs) is right below the stack overflow one. I like the php manual. Its pretty simple and has good exmamples. They seem

Note that php.net answer (official docs) is right below the stack overflow one. I like the php manual. Its pretty simple and has good exmamples. They seem to used to have allowed/ allowed user comments, which used to be really old. (this one seems more up to date)