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139 lines
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HTML
139 lines
9.0 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>Create a new paradox database</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.px-create-fp" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">px_create_fp</h1>
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<p class="verinfo">(PECL paradox >= 1.0.0)</p><p class="refpurpose"><span class="refname">px_create_fp</span> — <span class="dc-title">Create a new paradox database</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.px-create-fp-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>px_create_fp</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$pxdoc</code></span>
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, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$file</code></span>
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, <span class="methodparam"><span class="type">array</span> <code class="parameter">$fielddesc</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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Create a new paradox database file. The actual file has to be opened before
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with <span class="function"><a href="fopen.html" class="function">fopen()</a></span>. Make sure the file is writable.
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">Calling this functions issues a warning about an empty tablename which
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can be safely ignored. Just set the tablename afterwards with
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<span class="function"><a href="px_set_parameter.html" class="function">px_set_parameter()</a></span>.</p>
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</p></blockquote>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">This function is highly experimental, due to insufficient
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documentation of the paradox file format. Database files created with this
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function can be opened by <span class="function"><a href="px_open_fp.html" class="function">px_open_fp()</a></span> and has been
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successfully opened by the Paradox software, but your milage may vary.
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.px-create-fp-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">pxdoc</code></dt>
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<dd>
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<p class="para">
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Resource identifier of the paradox database
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as returned by <span class="function"><a href="px_new.html" class="function">px_new()</a></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">file</code></dt>
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<dd>
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<p class="para">File handle as returned by <span class="function"><a href="fopen.html" class="function">fopen()</a></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">fielddesc</code></dt>
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<dd>
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<p class="para">
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<strong class="option unknown">fielddesc</strong>
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is an array containing one element for each
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field specification. A field specification is an array itself with
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either two or three elements.The first element is always a string value
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used as the name of the field. It may not be larger than ten
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characters. The second element contains the field type which is one of
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the constants listed in the table <a href="paradox.constants.html#paradox.table-fieldtypes" class="link">Constants for field types</a>.
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In the case of a character field or bcd field, you will have to provide
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a third element specifying the length respectively the precesion of the
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field. If your field specification contains blob fields, you will have
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to make sure to either make the field large enough for all field values
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to fit or specify a blob file with
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<span class="function"><a href="px_set_blob_file.html" class="function">px_set_blob_file()</a></span> for storing the blobs. If this is
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not done the field data is truncated.
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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.px-create-fp-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 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.px-create-fp-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-2465">
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<p><strong>Example #1 Creating a Paradox database with two fields</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: #007700">if(!</span><span style="color: #0000BB">$pxdoc </span><span style="color: #007700">= </span><span style="color: #0000BB">px_new</span><span style="color: #007700">()) {<br /> </span><span style="color: #FF8000">/* Error handling */<br /></span><span style="color: #007700">}<br /></span><span style="color: #0000BB">$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #DD0000">"test.db"</span><span style="color: #007700">, </span><span style="color: #DD0000">"w+"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$fields </span><span style="color: #007700">= array(array(</span><span style="color: #DD0000">"col1"</span><span style="color: #007700">, </span><span style="color: #DD0000">"S"</span><span style="color: #007700">), array(</span><span style="color: #DD0000">"col2"</span><span style="color: #007700">, </span><span style="color: #DD0000">"I"</span><span style="color: #007700">));<br />if(!</span><span style="color: #0000BB">px_create_fp</span><span style="color: #007700">(</span><span style="color: #0000BB">$pxdoc</span><span style="color: #007700">, </span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #0000BB">$fields</span><span style="color: #007700">)) {<br /> </span><span style="color: #FF8000">/* Error handling */<br /></span><span style="color: #007700">}<br /></span><span style="color: #0000BB">px_set_parameter</span><span style="color: #007700">(</span><span style="color: #0000BB">$pxdoc</span><span style="color: #007700">, </span><span style="color: #DD0000">"tablename"</span><span style="color: #007700">, </span><span style="color: #DD0000">"testtable"</span><span style="color: #007700">);<br />for(</span><span style="color: #0000BB">$i</span><span style="color: #007700">=-</span><span style="color: #0000BB">50</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700"><</span><span style="color: #0000BB">50</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++) {<br /> </span><span style="color: #0000BB">$rec </span><span style="color: #007700">= array(</span><span style="color: #0000BB">$i</span><span style="color: #007700">, -</span><span style="color: #0000BB">$i</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">px_put_record</span><span style="color: #007700">(</span><span style="color: #0000BB">$pxdoc</span><span style="color: #007700">, </span><span style="color: #0000BB">$rec</span><span style="color: #007700">);<br />} <br /></span><span style="color: #0000BB">px_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$pxdoc</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">px_delete</span><span style="color: #007700">(</span><span style="color: #0000BB">$pxdoc</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</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>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.px-create-fp-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="px_new.html" class="function" rel="rdfs-seeAlso">px_new()</a> - Create a new paradox object</span></li>
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<li class="member"><span class="function"><a href="px_put_record.html" class="function" rel="rdfs-seeAlso">px_put_record()</a> - Stores record into paradox database</span></li>
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<li class="member"><span class="function"><a href="fopen.html" class="function" rel="rdfs-seeAlso">fopen()</a> - 打开文件或者 URL</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> |