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<sect1 xml:id="debugger-about">

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<title>About debugging in PHP</title>

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<simpara>

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PHP does not have an internal debugging facility.

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You can use one of the external debuggers though. The

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<link xlink:href="&url.zend.ide;">Zend IDE</link> includes

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a debugger, and there are also some free debugger extensions

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like DBG at <link xlink:href="&url.dbg;">&url.dbg;</link>, the

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<link xlink:href="&url.apd;">Advanced PHP Debugger</link> (APD) or

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<link xlink:href="&url.xdebug;">Xdebug</link>.

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PHP is shipped with a basic command line interactive debugger,

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<link linkend="migration56.new-features.phpdbg">phpdbg</link>.

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</simpara>

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<simpara>

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Most IDEs have support for <link xlink:href="&url.xdebug;">Xdebug</link>,

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a free debug tool, which allows for single step debugging your PHP

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applications.

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</simpara>

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</sect1>

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