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ValidVariableNameStandard.xml
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<documentation title="Variable Names"> <standard> <![CDATA[ Variable names should be camelCased with the first letter lowercase. Private and protected member variables should begin with an underscore ]]> </standard> <code_comparison> <code title="Valid: A multi-word variable uses camel casing."> <![CDATA[ <em>$testNumber</em> = 1; ]]> </code> <code title="Invalid: A multi-word variable uses underscores and initial capitalization."> <![CDATA[ <em>$Test_Number</em> = 1; ]]> </code> </code_comparison> <code_comparison> <code title="Valid: A private member variable begins with an underscore."> <![CDATA[ class Foo { private $<em>_</em>bar; } ]]> </code> <code title="Invalid: A private member variable does not begin with an underscore."> <![CDATA[ class Foo { private $bar; } ]]> </code> </code_comparison> </documentation>