How can I sort an associative array by its keys in PHP? Example code:

$person = array(
    "name" => "John Doe",
    "age" => 30,
    "email" => "[email protected]"
);

ksort($person);

print_r($person);

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

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

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

How can I use a regular expression to replace a pattern in a string in PHP? Example code:

How can I calculate the difference between two dates in PHP? Example code:

How can I use a regular expression to match a pattern in a string in PHP? Example code:

How can I use the array_chunk function to split an array into chunks in PHP? Example code:

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

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

How can I use the array_merge function to merge two or more arrays in PHP? Example code:

How can I use the curl_setopt function to set options for a cURL session 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 use the array_map function to apply a function to each element of an array in PHP? Example code:

How can I use the curl_setopt_array function to set multiple options for a cURL session in PHP? Example code:

How can I use the curl_init function to initialize a cURL session in PHP? Example code:

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

How can I use the array_filter function to filter an array based on a condition in PHP? Example code:

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

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

How can I check if a variable is set 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 a do-while loop in PHP? Example code:

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

How can I use a try-catch block 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 generate a random number 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 loop through an array in PHP? Example code