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<?xml version="1.0" encoding="utf-8"?>

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<chapter xml:id="outcontrol.flushing-system-buffers" xmlns="http://docbook.org/ns/docbook">

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<title>Flushing System Buffers</title>

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<para>

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PHP provides two related ways

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to flush (send and discard the contents of) system buffers:

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through calling <function>flush</function>

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and through enabling implicit flushing

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with <function>ob_implicit_flush</function>

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or the <link linkend="ini.implicit-flush">implicit_flush</link>

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&php.ini; setting.

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</para>

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<section>

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<title>Flushing System Buffers</title>

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<para>

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PHP provides two related ways

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to flush (send and discard the contents of) system buffers:

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through calling <function>flush</function>

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and through enabling implicit flushing

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with <function>ob_implicit_flush</function>

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or the <link linkend="ini.implicit-flush">implicit_flush</link>

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&php.ini; setting.

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</para>

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<title>Output Flushing Behaviour</title>

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<para>

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With implicit flushing disabled, PHP will flush output only

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when <function>flush</function> is called or when the script ends.

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