ExpressionLanguage

__construct(CacheItemPoolInterface $cache = null, array $providers = array())

Parameters

CacheItemPoolInterface	$cache
array	$providers

string compile(Expression|string $expression, array $names = array())

Compiles an expression source code.

Parameters

Expression|string	$expression	The expression to compile
array	$names	An array of valid names

Return Value

string

The compiled PHP source code

mixed evaluate(Expression|string $expression, array $values = array())

Evaluate an expression.

Parameters

Expression|string	$expression	The expression to compile
array	$values	An array of values

Return Value

mixed

The result of the evaluation of the expression

ParsedExpression parse(Expression|string $expression, array $names)

Parses an expression.

Parameters

Expression|string	$expression	The expression to parse
array	$names	An array of valid names

Return Value

ParsedExpression

A ParsedExpression instance

register(string $name, callable $compiler, callable $evaluator)

Registers a function.

Parameters

string	$name	The function name
callable	$compiler	A callable able to compile the function
callable	$evaluator	A callable able to evaluate the function

Exceptions

LogicException

when registering a function after calling evaluate(), compile() or parse()

See also

ExpressionFunction

addFunction(ExpressionFunction $function)

Parameters

ExpressionFunction

$function

registerProvider(ExpressionFunctionProviderInterface $provider)

Parameters

ExpressionFunctionProviderInterface

$provider

protected registerFunctions()