php-doc-en/reference/outcontrol/constants.xml

<?xml version="1.0" encoding="utf-8"?>
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<appendix xml:id="outcontrol.constants" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 &reftitle.constants;
 &extension.constants.core;
 <variablelist>
  <varlistentry xml:id="constant.php-output-handler-start">
   <term>
    <constant>PHP_OUTPUT_HANDLER_START</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Indicates that output buffering has begun.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-write">
   <term>
    <constant>PHP_OUTPUT_HANDLER_WRITE</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Indicates that the output buffer is being flushed, and had data to output.
    </para>
    <para>
     Available since PHP 5.4.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-flush">
   <term>
    <constant>PHP_OUTPUT_HANDLER_FLUSH</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Indicates that the buffer has been flushed.
    </para>
    <para>
     Available since PHP 5.4.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-clean">
   <term>
    <constant>PHP_OUTPUT_HANDLER_CLEAN</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Indicates that the output buffer has been cleaned.
    </para>
    <para>
     Available since PHP 5.4.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-final">
   <term>
    <constant>PHP_OUTPUT_HANDLER_FINAL</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Indicates that this is the final output buffering operation.
    </para>
    <para>
     Available since PHP 5.4.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-cont">
   <term>
    <constant>PHP_OUTPUT_HANDLER_CONT</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Indicates that the buffer has been flushed, but output buffering will
     continue.
    </para>
    <para>
     As of PHP 5.4, this is an alias for
     <constant>PHP_OUTPUT_HANDLER_WRITE</constant>.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-end">
   <term>
    <constant>PHP_OUTPUT_HANDLER_END</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Indicates that output buffering has ended.
    </para>
    <para>
     As of PHP 5.4, this is an alias for
     <constant>PHP_OUTPUT_HANDLER_FINAL</constant>.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-cleanable">
   <term>
    <constant>PHP_OUTPUT_HANDLER_CLEANABLE</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Controls whether an output buffer created by
     <function>ob_start</function> can be cleaned.
    </para>
    <para>
     Available since PHP 5.4.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-flushable">
   <term>
    <constant>PHP_OUTPUT_HANDLER_FLUSHABLE</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Controls whether an output buffer created by
     <function>ob_start</function> can be flushed.
    </para>
    <para>
     Available since PHP 5.4.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-removable">
   <term>
    <constant>PHP_OUTPUT_HANDLER_REMOVABLE</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     Controls whether an output buffer created by
     <function>ob_start</function> can be removed before the end of the script.
    </para>
    <para>
     Available since PHP 5.4.
    </para>
   </listitem>
  </varlistentry>
  <varlistentry xml:id="constant.php-output-handler-stdflags">
   <term>
    <constant>PHP_OUTPUT_HANDLER_STDFLAGS</constant>
     (<type>integer</type>)
   </term>
   <listitem>
    <para>
     The default set of output buffer flags; currently equivalent to
     <constant>PHP_OUTPUT_HANDLER_CLEANABLE</constant> |
     <constant>PHP_OUTPUT_HANDLER_FLUSHABLE</constant> |
     <constant>PHP_OUTPUT_HANDLER_REMOVABLE</constant>.
    </para>
    <para>
     Available since PHP 5.4.
    </para>
   </listitem>
  </varlistentry>
 </variablelist>
</appendix>

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