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  5.   <title>Closes a previously opened database connection</title>
    6. 

  6. 

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  8.  <body><div class="manualnavbar" style="text-align: center;">
    9. 

  9.  <div class="prev" style="text-align: left; float: left;"><a href="mysqlnduhconnection.charsetname.html">MysqlndUhConnection::charsetName</a></div>
    10. 

  10.  <div class="next" style="text-align: right; float: right;"><a href="mysqlnduhconnection.connect.html">MysqlndUhConnection::connect</a></div>
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  11.  <div class="up"><a href="class.mysqlnduhconnection.html">MysqlndUhConnection</a></div>
    12. 

  12.  <div class="home"><a href="index.html">PHP Manual</a></div>
    13. 

  13. </div><hr /><div id="mysqlnduhconnection.close" class="refentry">
    14. 

  14.  <div class="refnamediv">
    15. 

  15.   <h1 class="refname">MysqlndUhConnection::close</h1>
    16. 

  16.   <p class="verinfo">(PECL mysqlnd-uh &gt;= 1.0.0-alpha)</p><p class="refpurpose"><span class="refname">MysqlndUhConnection::close</span> &mdash; <span class="dc-title">Closes a previously opened database connection</span></p>
    17. 

  17. 

  18.  </div>
    19. 

  19. 

  20.  <div class="refsect1 description" id="refsect1-mysqlnduhconnection.close-description">
    21. 

  21.   <h3 class="title">说明</h3>
    22. 

  22.   <div class="methodsynopsis dc-description">
    23. 

  23.    <span class="modifier">public</span> <span class="type">bool</span> <span class="methodname"><strong>MysqlndUhConnection::close</strong></span>
    24. 

  24.     ( <span class="methodparam"><span class="type"><span class="type mysqlnd_connection">mysqlnd_connection</span></span> <code class="parameter">$connection</code></span>
    25. 

  25.    , <span class="methodparam"><span class="type">int</span> <code class="parameter">$close_type</code></span>
    26. 

  26.    )</div>
    27. 

  27. 

  28.   <p class="para rdfs-comment">
    29. 

  29.    Closes a previously opened database connection.
    30. 

  30.   </p>
    31. 

  31.   <blockquote class="note"><p><strong class="note">Note</strong>: 
    32. 

  32.    <p class="para">
    33. 

  33.     Failing to call the parent implementation may cause memory leaks or
    34. 

  34.     crash PHP. This is not considered a bug. Please, keep in mind that
    35. 

  35.     the <em>mysqlnd</em> library functions have never been designed
    36. 

  36.     to be exposed to the user space.
    37. 

  37.    </p>
    38. 

  38.   </p></blockquote>
    39. 

  39.  </div>
    40. 

  40. 

  41. 

  42.  <div class="refsect1 parameters" id="refsect1-mysqlnduhconnection.close-parameters">
    43. 

  43.   <h3 class="title">参数</h3>
    44. 

  44.   <dl>
    45. 

  45. 

  46.    <dt>
    47. 

  47. 

  48.     <span class="term"><em><code class="parameter">connection</code></em></span>
    49. 

  49.     <dd>
    50. 

  50. 

  51.      <p class="para">
    52. 

  52.       The connection to be closed. Do not modify!
    53. 

  53.      </p>
    54. 

  54.     </dd>
    55. 

  55. 

  56.    </dt>
    57. 

  57. 

  58.    <dt>
    59. 

  59. 

  60.     <span class="term"><em><code class="parameter">close_type</code></em></span>
    61. 

  61.     <dd>
    62. 

  62. 

  63.      <p class="para">
    64. 

  64.       Why the connection is to be closed. The value
    65. 

  65.       of <em><code class="parameter">close_type</code></em> is one of
    66. 

  66.       <strong><code>MYSQLND_UH_MYSQLND_CLOSE_EXPLICIT</code></strong>,
    67. 

  67.       <strong><code>MYSQLND_UH_MYSQLND_CLOSE_IMPLICIT</code></strong>,
    68. 

  68.       <strong><code>MYSQLND_UH_MYSQLND_CLOSE_DISCONNECTED</code></strong> or
    69. 

  69.        <strong><code>MYSQLND_UH_MYSQLND_CLOSE_LAST</code></strong>. The
    70. 

  70.        latter should never be seen, unless the default
    71. 

  71.        behaviour of the <em>mysqlnd</em> library
    72. 

  72.        has been changed by a plugin.
    73. 

  73.      </p>
    74. 

  74.     </dd>
    75. 

  75. 

  76.    </dt>
    77. 

  77. 

  78.   </dl>
    79. 

  79. 

  80.  </div>
    81. 

  81. 

  82. 

  83.  <div class="refsect1 returnvalues" id="refsect1-mysqlnduhconnection.close-returnvalues">
    84. 

  84.   <h3 class="title">返回值</h3>
    85. 

  85.   <p class="para">
    86. 

  86.    Returns <strong><code>TRUE</code></strong> on success.
    87. 

  87.    Otherwise, returns <strong><code>FALSE</code></strong>
    88. 

  88.   </p>
    89. 

  89.  </div>
    90. 

  90. 

  91. 

  92.  <div class="refsect1 examples" id="refsect1-mysqlnduhconnection.close-examples">
    93. 

  93.   <h3 class="title">范例</h3>
    94. 

  94.   <p class="para">
    95. 

  95.    <div class="example" id="example-1894">
    96. 

  96.     <p><strong>Example #1  <span class="function"><strong>MysqlndUhConnection::close()</strong></span> example</strong></p>
    97. 

  97.         <div class="example-contents">
    98. 

  98. <div class="phpcode"><code><span style="color: #000000">
    99. 

  99. <span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">function&nbsp;</span><span style="color: #0000BB">close_type_to_string</span><span style="color: #007700">(</span><span style="color: #0000BB">$close_type</span><span style="color: #007700">)&nbsp;{<br />&nbsp;</span><span style="color: #0000BB">$mapping&nbsp;</span><span style="color: #007700">=&nbsp;array(<br />&nbsp;&nbsp;</span><span style="color: #0000BB">MYSQLND_UH_MYSQLND_CLOSE_DISCONNECTED&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"MYSQLND_UH_MYSQLND_CLOSE_DISCONNECTED"</span><span style="color: #007700">,<br />&nbsp;&nbsp;</span><span style="color: #0000BB">MYSQLND_UH_MYSQLND_CLOSE_EXPLICIT&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"MYSQLND_UH_MYSQLND_CLOSE_EXPLICIT"</span><span style="color: #007700">,<br />&nbsp;&nbsp;</span><span style="color: #0000BB">MYSQLND_UH_MYSQLND_CLOSE_IMPLICIT&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"MYSQLND_UH_MYSQLND_CLOSE_IMPLICIT"</span><span style="color: #007700">,<br />&nbsp;&nbsp;</span><span style="color: #0000BB">MYSQLND_UH_MYSQLND_CLOSE_LAST&nbsp;</span><span style="color: #007700">=&gt;&nbsp;</span><span style="color: #DD0000">"MYSQLND_UH_MYSQLND_CLOSE_IMPLICIT"<br />&nbsp;</span><span style="color: #007700">);<br />&nbsp;return&nbsp;(isset(</span><span style="color: #0000BB">$mapping</span><span style="color: #007700">[</span><span style="color: #0000BB">$close_type</span><span style="color: #007700">]))&nbsp;?&nbsp;</span><span style="color: #0000BB">$mapping</span><span style="color: #007700">[</span><span style="color: #0000BB">$close_type</span><span style="color: #007700">]&nbsp;:&nbsp;</span><span style="color: #DD0000">'unknown'</span><span style="color: #007700">;<br />}<br /><br />class&nbsp;</span><span style="color: #0000BB">proxy&nbsp;</span><span style="color: #007700">extends&nbsp;</span><span style="color: #0000BB">MysqlndUhConnection&nbsp;</span><span style="color: #007700">{<br />&nbsp;&nbsp;public&nbsp;function&nbsp;</span><span style="color: #0000BB">close</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$close_type</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%s(%s)\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">__METHOD__</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">var_export</span><span style="color: #007700">(</span><span style="color: #0000BB">func_get_args</span><span style="color: #007700">(),&nbsp;</span><span style="color: #0000BB">true</span><span style="color: #007700">));<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"close_type&nbsp;=&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">close_type_to_string</span><span style="color: #007700">(</span><span style="color: #0000BB">$close_type</span><span style="color: #007700">));<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">/*&nbsp;WARNING:&nbsp;you&nbsp;must&nbsp;call&nbsp;the&nbsp;parent&nbsp;*/<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$ret&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">parent</span><span style="color: #007700">::</span><span style="color: #0000BB">close</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$close_type</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%s&nbsp;returns&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">__METHOD__</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">var_export</span><span style="color: #007700">(</span><span style="color: #0000BB">$ret</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">true</span><span style="color: #007700">));<br />&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">$ret</span><span style="color: #007700">;<br />&nbsp;}<br />}<br /></span><span style="color: #0000BB">mysqlnd_uh_set_connection_proxy</span><span style="color: #007700">(new&nbsp;</span><span style="color: #0000BB">proxy</span><span style="color: #007700">());<br /><br /></span><span style="color: #0000BB">$mysqli&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">mysqli</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"root"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">""</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"test"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?&gt;</span>
    100. 

  100. </span>
    101. 

  101. </code></div>
    102. 

  102.     </div>
    103. 

  103. 

  104.     <div class="example-contents"><p>以上例程会输出：</p></div>
    105. 

  105.     <div class="example-contents screen">
    106. 

  106. <div class="cdata"><pre>
    107. 

  107. proxy::close(array (
    108. 

  108.   0 =&gt; NULL,
    109. 

  109.   1 =&gt; 0,
    110. 

  110. ))
    111. 

  111. close_type = MYSQLND_UH_MYSQLND_CLOSE_EXPLICIT
    112. 

  112. proxy::close returns true
    113. 

  113. </pre></div>
    114. 

  114.     </div>
    115. 

  115.    </div>
    116. 

  116.   </p>
    117. 

  117.  </div>
    118. 

  118. 

  119. 

  120.  <div class="refsect1 seealso" id="refsect1-mysqlnduhconnection.close-seealso">
    121. 

  121.   <h3 class="title">参见</h3>
    122. 

  122.   <p class="para">
    123. 

  123.    <ul class="simplelist">
    124. 

  124.     <li class="member">
    125. 

  125.       <span class="function"><a href="function.mysqlnd-uh-set-connection-proxy.html" class="function" rel="rdfs-seeAlso">mysqlnd_uh_set_connection_proxy()</a> - Installs a proxy for mysqlnd connections</span>
    126. 

  126.     </li>
    127. 

  127.     <li class="member">
    128. 

  128.       <span class="function"><a href="mysqli.close.html" class="function" rel="rdfs-seeAlso">mysqli_close()</a> - Closes a previously opened database connection</span>
    129. 

  129.     </li>
    130. 

  130.     <li class="member">
    131. 

  131.       <span class="function"><a href="function.mysql-close.html" class="function" rel="rdfs-seeAlso">mysql_close()</a> - 关闭 MySQL 连接</span>
    132. 

  132.     </li>
    133. 

  133.    </ul>
    134. 

  134.   </p>
    135. 

  135.  </div>
    136. 

  136. 

  137. 

  138. </div><hr /><div class="manualnavbar" style="text-align: center;">
    139. 

  139.  <div class="prev" style="text-align: left; float: left;"><a href="mysqlnduhconnection.charsetname.html">MysqlndUhConnection::charsetName</a></div>
    140. 

  140.  <div class="next" style="text-align: right; float: right;"><a href="mysqlnduhconnection.connect.html">MysqlndUhConnection::connect</a></div>
    141. 

  141.  <div class="up"><a href="class.mysqlnduhconnection.html">MysqlndUhConnection</a></div>
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  142.  <div class="home"><a href="index.html">PHP Manual</a></div>
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  143. </div></body></html>
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