PHP Upgrades

~/.composer/vendor/bin/phpcs -s --standard=PHPCompatibility --extensions=php,inc,phtml .

preg_replace() - /e modifier is deprecated since PHP 5.5 and removed since PHP 7.0

// php5
function camelize($word) {
   return preg_replace('/(^|_)([a-z])/e', 'strtoupper("\\2")', $word);
}

// php7
function camelize_callback($matches) {
    return strtoupper($matches[2]);
}
function camelize($word) {
   return preg_replace_callback('/(^|_)([a-z])/', 'camelize_callback', $word);
}
echo camelize("_hello _world _123 _abc"), "\n\n";

$str = '&#x00040'; // @

if (PHP_VERSION < 7) {
    $result = preg_replace('~&#x(0*[0-9a-f]{2,5})~ei', 'chr(hexdec("\\1"))', $str);

} else  {
    $result = preg_replace_callback('~&#x(0*[0-9a-f]{2,5})~i', function($matches) {
        return chr(hexdec($matches[1]));
    }, $str);
}
echo $result, "\n";

Indirect access to variables, properties and methods will be evaluated strictly in left-to-right order since PHP 7.0

// php5
return $this->smarty->registered_plugins[$plugin_type][$tag][0][0]->$function[1]($new_args, $this);

// php7
return $this->smarty->registered_plugins[$plugin_type][$tag][0][0]->{$function[1]}($new_args, $this);

// php5
$$setting['variable'] = $setting['value'];

// php7
${$setting['variable']} = $setting['value'];

The behaviour of hexadecimal numeric strings was inconsistent prior to PHP 7 and support has been removed in PHP 7.

// php5
'0x42'

// php7
0x42