function.odbc-binmode.html
来自「php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容」· HTML 代码 · 共 188 行
HTML
188 行
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Handling of binary column data</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.odbc-autocommit.html">odbc_autocommit</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.odbc-close-all.html">odbc_close_all</a></div> <div class="up"><a href="ref.uodbc.html">ODBC Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.odbc-binmode" class="refentry"> <div class="refnamediv"> <h1 class="refname">odbc_binmode</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">odbc_binmode</span> — <span class="dc-title">Handling of binary column data</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>odbc_binmode</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$result_id</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$mode</tt></span> )</div> <p class="para rdfs-comment"> Enables handling of binary column data. ODBC SQL types affected are BINARY, VARBINARY, and LONGVARBINARY. </p> <p class="para"> When binary SQL data is converted to character C data, each byte (8 bits) of source data is represented as two ASCII characters. These characters are the ASCII character representation of the number in its hexadecimal form. For example, a binary 00000001 is converted to <i>"01"</i> and a binary 11111111 is converted to <i>"FF"</i>. <table border="5"> <caption><b>LONGVARBINARY handling</b></caption> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">binmode</th> <th colspan="1">longreadlen</th> <th colspan="1">result</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">ODBC_BINMODE_PASSTHRU</td> <td colspan="1" rowspan="1" align="left">0</td> <td colspan="1" rowspan="1" align="left">passthru</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">ODBC_BINMODE_RETURN</td> <td colspan="1" rowspan="1" align="left">0</td> <td colspan="1" rowspan="1" align="left">passthru</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">ODBC_BINMODE_CONVERT</td> <td colspan="1" rowspan="1" align="left">0</td> <td colspan="1" rowspan="1" align="left">passthru</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">ODBC_BINMODE_PASSTHRU</td> <td colspan="1" rowspan="1" align="left">0</td> <td colspan="1" rowspan="1" align="left">passthru</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">ODBC_BINMODE_PASSTHRU</td> <td colspan="1" rowspan="1" align="left">>0</td> <td colspan="1" rowspan="1" align="left">passthru</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">ODBC_BINMODE_RETURN</td> <td colspan="1" rowspan="1" align="left">>0</td> <td colspan="1" rowspan="1" align="left">return as is</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">ODBC_BINMODE_CONVERT</td> <td colspan="1" rowspan="1" align="left">>0</td> <td colspan="1" rowspan="1" align="left">return as char</td> </tr> </tbody> </colgroup> </table> </p> <p class="para"> If <a href="function.odbc-fetch-into.html" class="function">odbc_fetch_into()</a> is used, passthru means that an empty string is returned for these columns. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">result_id</tt></i></span> <dd> <p class="para"> The result identifier. </p> <p class="para"> If <i><tt class="parameter">result_id</tt></i> is <i>0</i>, the settings apply as default for new results. <blockquote><p><b class="note">Note</b>: <span class="simpara"> Default for longreadlen is <i>4096</i> and <i><tt class="parameter">mode</tt></i> defaults to <i>ODBC_BINMODE_RETURN</i>. Handling of binary long columns is also affected by <a href="function.odbc-longreadlen.html" class="function">odbc_longreadlen()</a>. </span> </p></blockquote> </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">mode</tt></i></span> <dd> <p class="para"> Possible values for <i><tt class="parameter">mode</tt></i> are: <ul class="itemizedlist"> <li class="listitem"> <span class="simpara"> <b><tt>ODBC_BINMODE_PASSTHRU</tt></b>: Passthru BINARY data </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>ODBC_BINMODE_RETURN</tt></b>: Return as is </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>ODBC_BINMODE_CONVERT</tt></b>: Convert to char and return </span> </li> </ul> </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.odbc-autocommit.html">odbc_autocommit</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.odbc-close-all.html">odbc_close_all</a></div> <div class="up"><a href="ref.uodbc.html">ODBC Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?