I have the following date: "11-07-2017" day / month / year
I need to convert it to "yy / mm / dd" to insert it into the mysql bd I have tried with this without results:
$date = 11-07-2017;
date_format($date,'Y-m-d');
I get this error:
Severity: Warning
Message: date_format () expects parameter 1 to be DateTime, string given
As the error itself indicates, you are passing it a String as a parameter when you should pass it a date object.
To do this, you should use the DateTime function:
<?php
$date = new DateTime("11-07-2017");
$fecha = date_format($date,'Y-m-d');
echo $fecha; //Devuelve 2017-07-11
If you wanted the separations to be with bars then you should put:
$fecha = date_format($date,'Y/m/d');
echo $fecha; //Devuelve 2017/07/11