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abstract protected function FeedsExBase::validateExpression in Feeds extensible parsers 7.2

Same name and namespace in other branches

7 src/FeedsExBase.inc \FeedsExBase::validateExpression()

Validates an expression.

Parameters

string &$expression: The expression to validate.

Return value

string|null Return the error string, or null if validation was passed.

1 call to FeedsExBase::validateExpression()

FeedsExBase::configFormValidate in src/FeedsExBase.inc

4 methods override FeedsExBase::validateExpression()

FeedsExJmesPath::validateExpression in src/FeedsExJmesPath.inc: Validates an expression.
FeedsExJsonPath::validateExpression in src/FeedsExJsonPath.inc: Validates an expression.
FeedsExTestUi::validateExpression in tests/FeedsExTestUi.inc: Validates an expression.
FeedsExXml::validateExpression in src/FeedsExXml.inc: Validates an expression.

File

src/FeedsExBase.inc, line 65: Contains FeedsExBase.

Class

FeedsExBase: The Feeds extensible parser.

Code

protected abstract function validateExpression(&$expression);