ini_set('display_errors', 1);
$fd = fopen("c:/temp/abc.txt", "r");
echo "継続処理";
a();
echo "継続処理";
$ php index.php
Warning: fopen(c:/temp/abc.txt): failed to open stream: No such file or directory in /home/vagrant/dev/test/index.php on line 5
継続処理
Fatal error: Uncaught Error: Call to undefined function a() in /home/vagrant/dev/test/index.php:8
Stack trace:
#0 {main}
  thrown in /home/vagrant/dev/test/index.php on line 8
### set_error_handler
set_error_handler(function($errno, $errstr, $errfile, $errline){
	print("エラーが発生しました。$errno, $errstr <br>");
});
$fd = fopen("c:/temp/abc.txt", "r");
$ php index.php
エラーが発生しました。2, fopen(c:/temp/abc.txt): failed to open stream: No such file or directory 
### Exception
例外が発生しそうな処理には、try, catch, finallyを使う
set_error_handler(function($errno, $errstr, $errfile, $errline) {
    if (!(error_reporting() & $errno)) {
        return;
    }
    throw new ErrorException($errstr, $errno, 0, $errfile, $errline);
});
try {
	$fd = fopen("c:/temp/abc.txt", "r");	
} catch(Exception $e){
	echo "例外が発生しました。".$e->getMessage();
}