Search results for: "undefined variable"

What are some alternative methods to get the dimensions of an image if Getimagesize only works with a file path in PHP?

Getimagesize function in PHP only works with a file path, so if you have an image stored in a variable or retrieved from a URL, you cannot directly us...

When should variables be concatenated using the dot (.) operator in PHP, and when is it not necessary?

Variables should be concatenated using the dot (.) operator in PHP when you want to combine the values of two or more variables into a single string....

How can PHP scripts differentiate between server users and users accessing content through a browser, and how does this impact file access permissions?

PHP scripts can differentiate between server users and users accessing content through a browser by checking the value of the $_SERVER['REMOTE_ADDR']...

What are some common debugging techniques for identifying issues with variables in PHP scripts?

One common debugging technique for identifying issues with variables in PHP scripts is to use var_dump() or print_r() to display the contents of the v...

How can the issue of $checked being overwritten in a loop be addressed when trying to display multiple checkbox values from an array in PHP?

Issue: The problem arises when displaying multiple checkbox values from an array in PHP using a loop. If the $checked variable is not reset in each it...