The native way to check if a directory exists in PHP is by using the is_dir() function.
is_dir()
PHP helps you create temporary files with the tmpfile() function, which creates a file for you in your system’s temp directory.
tmpfile()
How to: Using file_get_contents: $content = file_get_contents("example.txt"); echo $content; Sample Output: Hello, World! This is content from the text file. Using fopen and fgets: $handle = fopen("example.txt", "r"); if ($handle) { while (($line = fgets($handle)) !== false) { echo $line; } fclose($handle); } Sample Output: Hello, World! This is content from the text file. Writing to a file with file_put_contents: $newContent = "Adding new text."; file_put_contents("example.txt", $newContent); Deep Dive Reading text files is as old as programming itself.
PHP uses a global array $argv to store command line arguments, with $argv[0] being the script name.
$argv
$argv[0]
PHP natively supports file writing through functions like file_put_contents, fopen together with fwrite, and fclose.
file_put_contents
fopen
fwrite
fclose
In PHP, writing to stderr can be achieved using the fwrite() function alongside the predefined constant STDERR, which represents the error output stream.
fwrite()
STDERR