php-doc-en/reference/mysqlnd_qc/functions/mysqlnd-qc-get-cache-info.xml

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

<refentry xml:id="function.mysqlnd_qc_get_cache_info" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <refnamediv>
    <refname>mysqlnd_qc_get_cache_info</refname>
    <refpurpose>Returns information on the current handler, the number of cache entries and cache entries, if available</refpurpose>
  </refnamediv>

  <refsect1 role="description">
  &reftitle.description;
    <methodsynopsis>
      <type>array</type>
      <methodname>mysqlnd_qc_get_cache_info</methodname>
      <void />
    </methodsynopsis>
    <para>
    
    </para>

  </refsect1>

  <refsect1 role="parameters">
  &reftitle.parameters;
  &no.function.parameters;
  </refsect1>

  <refsect1 role="returnvalues">
  &reftitle.returnvalues;
    <para>
    Returns information on the current handler, the number of cache entries and 
    cache entries, if available. If and what data will be returned for the cache
    entries is subject to the active storage handler.
    Storage handler are free to return any data. Storage handler are
    recommended to return at least the data provided by the default handler,
    if technically possible.
    </para>
  </refsect1>
 
  <refsect1 role="examples">
  &reftitle.examples;
    <example>
      <para>
        The example shows the output from the built-in default storage handler.
        Other storage handler may report different data.
      </para>
      <programlisting role="php">
<![CDATA[
<?php
/* Populate the cache, e.g. using mysqli */
$mysqli = new mysqli("host", "user", "password", "schema");
$mysqli->query("/*" . MYSQLND_QC_ENABLE_SWITCH . "*/SELECT id FROM test");

/* Display cache information */
var_dump(mysqlnd_qc_get_cache_info());
?>
]]>
      </programlisting>
   &examples.outputs;
      <screen>
<![CDATA[
array(4) {
 ["num_entries"]=>
 int(1)
 ["handler"]=>
 string(7) "default"
 ["handler_version"]=>
 string(5) "1.0.0"
 ["data"]=>
 array(1) {
   ["Localhost via UNIX socket 3306 user schema|/*qc=on*/SELECT id FROM test"]=>
   array(2) {
     ["statistics"]=>
     array(11) {
       ["rows"]=>
       int(6)
       ["stored_size"]=>
       int(101)
       ["cache_hits"]=>
       int(0)
       ["run_time"]=>
       int(471)
       ["store_time"]=>
       int(27)
       ["min_run_time"]=>
       int(0)
       ["max_run_time"]=>
       int(0)
       ["min_store_time"]=>
       int(0)
       ["max_store_time"]=>
       int(0)
       ["avg_run_time"]=>
       int(0)
       ["avg_store_time"]=>
       int(0)
     }
     ["metadata"]=>
     array(1) {
       [0]=>
       array(8) {
         ["name"]=>
         string(2) "id"
         ["orig_name"]=>
         string(2) "id"
         ["table"]=>
         string(4) "test"
         ["orig_table"]=>
         string(4) "test"
         ["db"]=>
         string(4) "schema"
         ["max_length"]=>
         int(1)
         ["length"]=>
         int(11)
         ["type"]=>
         int(3)
       }
     }
   }
 }
}

]]>
      </screen>

    </example>
  </refsect1>

</refentry>

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