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1 lars 1 
<documentation title="Default Values in Function Declarations">
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    <standard>
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    <![CDATA[
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    Arguments with default values go at the end of the argument list.
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    ]]>
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    </standard>
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    <code_comparison>
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        <code title="Valid: argument with default value at end of declaration">
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        <![CDATA[
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function connect($dsn, <em>$persistent = false</em>)
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{
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    ...
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}
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        ]]>
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        </code>
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        <code title="Invalid: argument with default value at start of declaration">
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        <![CDATA[
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function connect(<em>$persistent = false</em>, $dsn)
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{
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    ...
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}
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        ]]>
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        </code>
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    </code_comparison>
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</documentation>