PHP Notes

The isset() function checks if the variable is defined and not null. In PHP, the isset() function is used to determine whether a variable is set and is not NULL. It returns true if the variable exists and has a value other than NULL. Otherwise, it returns false. Here’s a simple explanation: phpCopy code $var … Read more

The header() function is used to send a raw HTTP header to a client. It must be called before sending the actual output. For example, you can’t print any HTML element before using this function. In PHP, the header() function is used to send raw HTTP headers to the client. These headers are used to … Read more

The PHP count() function is used to count total elements in the array, or something an object. In PHP, the count() function is used to count the number of elements in an array or the properties of an object. It returns the number of elements in an array or the number of properties in an … Read more

For, while, do-while and for each. In PHP, there are several types of loops that can be used to iterate over arrays, execute code blocks repeatedly, or perform looping based on certain conditions. The main types of loops in PHP include: for loop: A for loop is used when you know in advance how many … Read more

PHP single line comment is made in two ways: Using // (C++ style single line comment) Using # (Unix Shell style single line comment) PHP multi-line comment is made by enclosing all lines within. In PHP, you can use single-line comments using // and multi-line comments using /* */. Here’s how you do it: Single-line … Read more