How can I use an elseif statement in PHP? Example code:

Listen

$age = 30;

if ($age < 18) {
    echo "You are a minor";
} elseif ($age >= 18 && $age < 65) {
    echo "You are an adult";
} else {
    echo "You are a senior citizen";
}

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

How can I prevent SQL injection in PHP?

How can I redirect to another page in PHP? Example code:

How can I use the filesize function to get the size of a file in PHP? Example code:

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

Get User IP Address using PHP – Source Code + Demo

How can I use the fopen and fwrite functions to write a string to a file in PHP? Example code:

How can I replace a substring in a string 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 retrieve data from a MySQL database using PHP? Example code

How can I read a CSV file in PHP? Example code:

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

How can I use the fopen and fgets functions to read a file line by line in PHP? Example code:

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

How can I use the array_diff function to get the elements in one array that are not in another array in PHP? Example code:

How can I connect to a MySQL database using PHP? Example code.

How can I use the fgetcsv function to read a CSV file into an array 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 sort an array in PHP? Example code:

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

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

How can I subtract days from a date in PHP? Example code:

How can I use the array_slice function to get a portion of an array in PHP? Example code:

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

How can I use the array_push function to add an element to an array in PHP? Example code:

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

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

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