File "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>