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

Listen

$string = "The quick brown fox jumps over the lazy dog";

if (preg_match("/brown/", $string)) {
    echo "The string contains 'brown'";
} else {
    echo "The string does not contain 'brown'";
}

Get User IP Address using PHP – Source Code + Demo

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

How can I use a do-while loop 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 use a try-catch block 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 the file_get_contents function to read the contents of a file into a string 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 add days to a date in PHP? Example code:

How can I replace a substring in a string in PHP? Example code:

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

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

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

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

How can I format a date in PHP? Example code:

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

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

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

How can I use the is_readable function to check if a file is readable 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 format a number with commas 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: