PHP Development

Working with files

Create file

$file = fopen("test.txt", "w"); // w = write mode (overwrites)
fwrite($file, "Hello World");
fclose($file);

Append to file

file_put_contents("test.txt", "More text\n", FILE_APPEND);

Functions

• fopen() → open files
• fwrite() → write to file
• file_put_contents() → write/append in one call
• strlen() → get string length

Run Multiple PHP Scripts at the same time

PHP is single-threaded by default. Options:

• Background execution: exec("php script.php > /dev/null &");
• Multi-process: pcntl_fork() (CLI only, not in web server)
• Async frameworks: ReactPHP, AMP
• HTTP parallel: curl_multi_* functions
• Task queues: Gearman, RabbitMQ, Swoole

Find running scripts in Linux:

ps aux | grep php