Is using sleep() function a reliable method for pausing a PHP script until user input is received?

Using the sleep() function to pause a PHP script until user input is received is not a reliable method because it simply delays the execution for a specified number of seconds, regardless of whether user input is provided or not. A more effective approach would be to use a loop that continuously checks for user input using functions like fgets() or readline(). 

<?php

// Loop until user input is received
while (true) {
    $input = readline("Enter your input: ");
    
    if ($input) {
        // User input received, continue with the script
        echo "User input: " . $input;
        break;
    }
}

// Rest of the script continues here

?>

Keywords

sleep() PHP script user input reliability function

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