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Symfony ExpressionLanguage Component Fork
The ExpressionLanguage component provides an engine that can compile and evaluate expressions:, (*1)
use Hydra\Component\ExpressionLanguage\ExpressionLanguage;
$language = new ExpressionLanguage();
echo $language->evaluate('1 + foo', array('foo' => 2));
// would output 3
echo $language->compile('1 + foo', array('foo'));
// would output (1 + $foo)
By default, the engine implements simple math and logic functions, method calls, property accesses, and array accesses., (*2)
You can extend your DSL with functions:, (*3)
$compiler = function ($arg) {
return sprintf('strtoupper(%s)', $arg);
};
$evaluator = function (array $variables, $value) {
return strtoupper($value);
};
$language->register('upper', $compiler, $evaluator);
echo $language->evaluate('"foo" ~ upper(foo)', array('foo' => 'bar'));
// would output fooBAR
echo $language->compile('"foo" ~ upper(foo)');
// would output ("foo" . strtoupper($foo))
You can run the unit tests with the following command:, (*4)
$ composer.phar install --dev $ phpunit
Symfony ExpressionLanguage Component Fork
MIT