How can I calculate the sum of an array in PHP? Example code:

$numbers = array(3, 1, 4, 1, 5, 9, 2, 6, 5, 3);

// Calculate sum of array
$sum = array_sum($numbers);
echo "Sum: " . $sum;

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 sort an array in PHP? Example code:

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

How can I use the array_intersect function to get the common elements between two or more arrays in PHP? Example code:

How can I generate a random string in PHP? Example code:

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

How can I use a ternary operator in PHP? Example code:

How can I format a number with commas 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 explode function to split a string into an array with a limit in PHP? Example code:

How can I redirect to another page 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 create a multidimensional array in PHP? Example code:

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

How can I use the explode function to split a string into an array in PHP? Example code:

How can I use a foreach loop 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 a regular expression to match a pattern in a string 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 generate a random number in PHP? Example code

How can I use the in_array function to check if an element exists in an array in PHP? Example code:

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

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

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

How can I get the current date and time 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 file in PHP? Example code:

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

How can I check if a variable is set in PHP? Example code:

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