PHP 5.6 will be End of Life in mear months with no more updates, security patches, no more assistance when issues are discovered. PHP 5 is the glue of the modern public internet. It is not a matter of IF you will be breached; but WHEN. Do you really want to be one of the companies listed on https://haveibeenpwned.com/ due to a data breach? Do you have an application running PHP 5 and you do not have an upgrade path to completion in the next 6 months? Start planning to have a bad press, a damaged reputation, lose customers, and possible lawsuit due to legnagance.”]
Source: https://dev.to/david_j_eddy/php-5-end-of-life-is-upon-us-why-you-should-care-3gpk