Be careful when using the return value to this function. Because it returns the old handler, you may be tempted to do something like:
<?php
function do_something()
{
$old = set_error_handler(“my_error_handler”);
set_error_handler($old);
}
?>
This will work, but it will bite you because each time you do this, it will cause a memory leak as the old error handler is put on a stack for the restore_error_handler() function to use.
So always restore the old error handler using that function instead:
<?php
function do_something()
{
set_error_handler(“my_error_handler”);
restore_error_handler();
}
?>
