How can I create a session variable in PHP? Example code

Listen

session_start();
$_SESSION["username"] = "johndoe";
echo "Session variable created";

How can I retrieve data from a MySQL database using PHP? Example code

How can I convert a string to uppercase in PHP? Example code:

How can I use the array_reduce function to apply a function to each element of an array and reduce it to a single value in PHP? Example code:

How can I use the glob function to get a list of files that match a pattern in PHP? Example code:

How can I use the implode function to join an array into a string with a separator in PHP? Example code:

How can I use an if-else statement in PHP? Example code:

How can I sort an array in PHP? Example code:

How can I create a file in PHP? Example code:

How can I check if a string ends with a certain substring in PHP? Example code:

How can I use the array_unique function to remove duplicate elements from an array in PHP? Example code:

How can I use the array_values function to get an array of values from an associative array in PHP? Example code:

How can I use the array_walk function to apply a function to each element of an array in PHP? Example code:

How can I trim whitespace from the beginning and end of a string in PHP? Example code:

How can I use the json_decode function to convert a JSON string to an array or object in PHP? Example code:

How can I use a switch statement with multiple cases in PHP? Example code:

How can I use the file_put_contents function to write a string to a file in PHP? Example code:

How can I upload a file using PHP? Example code

How can I loop through an array in PHP? Example code

How can I use the array_keys function to get an array of keys from an associative array in PHP? Example code:

How can I create a multidimensional array in PHP? Example code:

How can I send an email using PHP? Example code

How can I use the rename function to rename a file or directory in PHP? Example code:

How can I use the array_pop function to remove the last element from an array in PHP? Example code:

How can I use the htmlentities function to convert special characters to HTML entities in PHP? Example code:

How can I use the mkdir function to create a directory in PHP? Example code:

How can I use the array_splice function to remove and replace elements in an array in PHP? Example code:

How can I use the scandir function to get a list of files and directories in a directory in PHP? Example code:

How can I use the copy function to copy a file in PHP? Example code:

How can I use a for loop in PHP? Example code:

How can I use a while loop in PHP? Example code: