What are the limitations of using a cron job for running a PHP script at intervals less than 1 minute?

Cron jobs have a minimum interval of 1 minute, so they cannot be used to run a PHP script at intervals less than 1 minute. To achieve more frequent execution, you can create a PHP script that runs continuously in the background and sleeps for a specified interval before executing the desired task again. 

<?php
while (true) {
    // Your PHP script logic here

    sleep(30); // Sleep for 30 seconds before running again
}

Keywords

cron job PHP script limitations intervals less than 1 minute

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