PHP

php show error

error_reporting(E_ALL);
ini_set('display_errors', 1);

show display error php

//PHP functions - add the lines in the above of page

ini_set('display_errors', 1);
ini_set('display_startup_errors', 0);
error_reporting(E_ALL & ~E_NOTICE);

display error php

<?php
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
?>

<?php
error_reporting(E_ALL & ~E_NOTICE); // if don't want to see notice
// Or
error_reporting(E_ALL);
?>

show php all errors

error_reporting(E_ALL);
ini_set('display_errors', '1');

display php error

Only display php errors to the developer...

<?php
if($_SERVER['REMOTE_ADDR']=="00.00.00.00")
{
  ini_set('display_errors','On');
}
else
{
  ini_set('display_errors','Off');
}
?>

Just replace 00.00.00.00 with your ip address.