Processing: chap_01_php5_to_php7_code_converter_test_file.php
<%
date_default_timezone_set('Europe/Berlin');
function myErrorHandler($errno, $errstr, $errfile, $errline)
{
    // some code
}
// WARNING: might not catch all errors
// see: http://php.net/manual/en/language.errors.php7.php
$old_error_handler = set_error_handler("myErrorHandler");

$php5  = 'Works in PHP 5';
$foo   = ['bar' => ['baz' => 'php5']];
// WARNING: variable interpolation now occurs left-to-right
// see: http://php.net/manual/en/migration70.incompatible.php
echo $$foo['bar']['baz'];
echo PHP_EOL;

// WARNING: changes have been made in how the list() operator is handled
// see: http://php.net/manual/en/migration70.incompatible.php
list() = $a;

// WARNING: \u{xxx} is now considered unicode escape syntax
// see: http://php.net/manual/en/migration70.new-features.php#migration70.new-features.unicode-codepoint-escape-syntax
echo '\u{xxx} has a special meaning in PHP 7';
echo PHP_EOL;

// WARNING: negative and out-of-range bitwise shift operations will now throw an ArithmeticError
// see: http://php.net/manual/en/migration70.incompatible.php
try {
	var_dump(1 << -1);
} catch (\ArithmeticError $e) {
	error_log("File:" . $e->getFile() . " Line:" . $e->getLine() . " Message:" . $e->getMessage());
}

echo PHP_EOL;
// WARNING: negative and out-of-range bitwise shift operations will now throw an ArithmeticError
// see: http://php.net/manual/en/migration70.incompatible.php
try {
	var_dump(1 >> 65);
} catch (\ArithmeticError $e) {
	error_log("File:" . $e->getFile() . " Line:" . $e->getLine() . " Message:" . $e->getMessage());
}

echo PHP_EOL;

$now = new DateTime();
// WARNING: call_user_method_array() has been removed from PHP 7
call_user_func_array([$now,'setDate'],  array(2016, 11, 11));
// WARNING: call_user_method_array() has been removed from PHP 7
call_user_func_array([$now,'setTime'],  array(11, 11, 11));
echo // WARNING: call_user_method() has been removed from PHP 7
call_user_func([$now,'format'], 'Y-m-d H:i:s');
echo PHP_EOL;

$ids = 'Alice = 1, Dick = 33, Jane = 102, Fred = 88';
// WARNING: preg_replace() "/e" modifier has been removed from PHP 7
echo preg_replace_callback('/([0-9]{1,3})/',function ($m) { return echo sprintf("%03d",$m); }, $ids);
echo PHP_EOL;

?>