|
|
| (One intermediate revision by the same user not shown) |
| Line 1: |
Line 1: |
| {{stub}} | | {{to htyp}} |
| [[Category:Techniques]]
| |
| ==Reference==
| |
| *[http://php.net/ PHP Homepage]
| |
| ==Newbie Traps & Pitfalls==
| |
| PHP will let you get away with a lot of syntax mistakes which are perfectly valid code (often creating unexpected variables in the process) but not what you intended. Most of the following produced no immediate error messages; the code simply wouldn't work, and it took me several edit-upload-run cycles to find each problem. Here are some mistakes I made when re-learning PHP in 2005 after not using it since 1997:
| |
| *Classes
| |
| **Member vars and functions must ''always'' be referred to using '''$this->''FunctionName''()'''
| |
| **However, var members do not take a $ prefix: '''$this->''varName'''''
| |
| **If you pass an object to a function, the function will be operating on a ''copy'' of the object unless the function is called with the object passed as a reference: '''''CalledFunction''(&$''objName'');'''. The function declaration itself needs no modifications.
| |
| **If the function is expected to store the object for later use (e.g. it is a class constructor), the function must also use a reference when saving the object: '''$this->''localName'' =& $''iObjectParam'';'''. Otherwise (again) it will be using a copy, not the original.
| |
| *Operators
| |
| **The "is equal to" comparison operator is "==" (as in c/c++), not "="
| |
This page has been moved to HTYP, the HyperTwin Yellow Pages.