Mohammad questions

• what is the best way to remove non numeric characters from the beginning of a string?
• sequential strpos() faster than a function with one preg_match?
• How to make sure a file handle has been closed before next operation?
• How to hide a Div when the scroll bar is moving with jQuery?
• Where to return false in a PHP function?
• strrpos in PHP finding last character position instead?
• The difference between n++ VS ++n in Java
• How to combine two arrays together?
• Is there anyway to count how many keys an array has in Php?
• How to implement JQuery easing into this window scroll movement function?

Mohammad answers