26 lines
1 KiB
XML
26 lines
1 KiB
XML
<?xml version="1.0"?>
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<documentation xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:noNamespaceSchemaLocation="https://phpcsstandards.github.io/PHPCSDevTools/phpcsdocs.xsd"
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title="Foreach Unique Assignment"
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>
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<standard>
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<![CDATA[
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When a foreach control structure uses the same variable for both the $key as well as the $value assignment, the key will be disregarded and be inaccessible and the variable will contain the value.
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Mix in reference assignments and the behaviour becomes even more unpredictable.
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This is a coding error. Either use unique variables for the key and the value or don't assign the key.
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]]>
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</standard>
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<code_comparison>
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<code title="Valid: using unique variables.">
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<![CDATA[
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foreach ($array as $k => $v ) {}
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]]>
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</code>
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<code title="Invalid: using the same variable for both the key as well as the value.">
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<![CDATA[
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foreach ($array as $k => $k ) {}
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]]>
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</code>
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</code_comparison>
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</documentation>
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