How can I use the file_get_contents function to read the contents of a file into a string in PHP? Example code:

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$file_contents = file_get_contents("example.txt");

echo $file_contents;

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

How to send SMS using PHP program (full code sample included)

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

How can I shuffle an array 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 a for loop in PHP? Example code:

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

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

How can I use the array_search function to search for a value in an array and return its key in PHP? Example code:

How can I read data from a JSON file using PHP? Example code:

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

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

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

How can I validate a form using PHP? Example code

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

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

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

How can I use the curl_init function to initialize a cURL session 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 use the implode function to join an array into a string in PHP? Example code:

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

How can I read a CSV file 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 calculate the sum of an array 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 a conditional statement in PHP? Example code

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