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140 lines
6.8 KiB
HTML
140 lines
6.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Get the length of a field</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.mssql-field-length" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mssql_field_length</h1>
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<p class="verinfo">(PHP 4, PHP 5, PECL odbtp >= 1.1.1)</p><p class="refpurpose"><span class="refname">mssql_field_length</span> — <span class="dc-title">Get the length of a field</span></p>
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</div>
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<div id="function.mssql-field-length-refsynopsisdiv">
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<div class="warning"><strong class="warning">Warning</strong>
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<p class="para">
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This function was <em class="emphasis">REMOVED</em> in PHP 7.0.0.
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</p>
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<p class="para">
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Alternatives to this function include:
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</p>
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="pdostatement.getcolumnmeta.html" class="function">PDOStatement::getColumnMeta()</a></span></li>
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<li class="member"><span class="function"><a href="sqlsrv_field_metadata.html" class="function">sqlsrv_field_metadata()</a></span></li>
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<li class="member"><span class="function"><a href="odbc_field_len.html" class="function">odbc_field_len()</a></span></li>
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</ul>
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</div>
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</div>
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<div class="refsect1 description" id="refsect1-function.mssql-field-length-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>mssql_field_length</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$offset</code><span class="initializer"> = -1</span></span>
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] ) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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Returns the length of field no. <code class="parameter">offset</code> in
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<code class="parameter">result</code>.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mssql-field-length-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">result</code></dt>
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<dd>
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<p class="para">
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The result resource that is being evaluated. This result comes from a
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call to <span class="function"><a href="mssql_query.html" class="function">mssql_query()</a></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">offset</code></dt>
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<dd>
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<p class="para">
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The field offset, starts at 0. If omitted, the current field is used.
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.mssql-field-length-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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The length of the specified field index on success 或者在失败时返回 <strong><code>FALSE</code></strong>.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.mssql-field-length-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-1757">
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<p><strong>Example #1 <span class="function"><strong>mssql_field_length()</strong></span> example</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Connect to MSSQL and select the database<br /></span><span style="color: #0000BB">mssql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'MANGO\SQLEXPRESS'</span><span style="color: #007700">, </span><span style="color: #DD0000">'sa'</span><span style="color: #007700">, </span><span style="color: #DD0000">'phpfi'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">mssql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">'php'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Send a select query to MSSQL<br /></span><span style="color: #0000BB">$query </span><span style="color: #007700">= </span><span style="color: #0000BB">mssql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">'SELECT [name], [age] FROM [php].[dbo].[persons]'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Print the field length<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">'The field \'age\' has a data length of ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mssql_field_length</span><span style="color: #007700">(</span><span style="color: #0000BB">$query</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Free the query result<br /></span><span style="color: #0000BB">mssql_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$query</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程的输出类似于：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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The field 'age' has a data length of 4
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.mssql-field-length-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<strong>Note to Windows Users</strong><br />
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<p class="para">
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Due to a limitation in the underlying <acronym title="Application Programming Interface">API</acronym> used by <acronym title="PHP: Hypertext Preprocessor">PHP</acronym> (MS DBLib C <acronym title="Application Programming Interface">API</acronym>),
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the length of <em>VARCHAR</em> fields is limited to
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<em class="emphasis">255</em>. If you need to store more data, use a
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<em>TEXT</em> field instead.
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.mssql-field-length-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="mssql_field_name.html" class="function" rel="rdfs-seeAlso">mssql_field_name()</a> - Get the name of a field</span></li>
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<li class="member"><span class="function"><a href="mssql_field_type.html" class="function" rel="rdfs-seeAlso">mssql_field_type()</a> - Gets the type of a field</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |