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168 lines
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HTML
168 lines
8.7 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>Opens an SQLite database and create the database if it does not exist</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.sqlite-open" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">sqlite_open</h1>
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<p class="verinfo">(PHP 5 < 5.4.0, PECL sqlite >= 1.0.0)</p><p class="refpurpose"><span class="refname">sqlite_open</span> — <span class="dc-title">Opens an SQLite database and create the database if it does not exist</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.sqlite-open-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>sqlite_open</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$mode</code><span class="initializer"> = 0666</span></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter reference">&$error_message</code></span>
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]] ) : <span class="type">resource</span></div>
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<p class="para rdfs-comment">面向对象风格 (constructor):</p>
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<div class="constructorsynopsis dc-description">
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<span class="modifier">final</span> <span class="modifier">public</span> <span class="methodname"><strong>SQLiteDatabase::__construct</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$mode</code><span class="initializer"> = 0666</span></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter reference">&$error_message</code></span>
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]] )</div>
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<p class="para rdfs-comment">
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Opens an SQLite database or creates the database if it does not exist.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.sqlite-open-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">filename</code></dt>
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<dd>
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<p class="para">
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The filename of the SQLite database. If the file does not exist, SQLite
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will attempt to create it. PHP must have write permissions to the file
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if data is inserted, the database schema is modified or to create the
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database if it does not exist.
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</p>
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</dd>
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<dt>
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<code class="parameter">mode</code></dt>
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<dd>
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<p class="para">
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The mode of the file. Intended to be used to open the database in
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read-only mode. Presently, this parameter is ignored by the sqlite
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library. The default value for mode is the octal value
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<em>0666</em> and this is the recommended value.
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</p>
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</dd>
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<dt>
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<code class="parameter">error_message</code></dt>
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<dd>
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<p class="para">
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Passed by reference and is set to hold a descriptive error message
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explaining why the database could not be opened if there was an error.
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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.sqlite-open-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns a resource (database handle) on success, <strong><code>FALSE</code></strong> on error.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.sqlite-open-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-2545">
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<p><strong>Example #1 <span class="function"><strong>sqlite_open()</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: #007700">if (</span><span style="color: #0000BB">$db </span><span style="color: #007700">= </span><span style="color: #0000BB">sqlite_open</span><span style="color: #007700">(</span><span style="color: #DD0000">'mysqlitedb'</span><span style="color: #007700">, </span><span style="color: #0000BB">0666</span><span style="color: #007700">, </span><span style="color: #0000BB">$sqliteerror</span><span style="color: #007700">)) { <br /> </span><span style="color: #0000BB">sqlite_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$db</span><span style="color: #007700">, </span><span style="color: #DD0000">'CREATE TABLE foo (bar varchar(10))'</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">sqlite_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$db</span><span style="color: #007700">, </span><span style="color: #DD0000">"INSERT INTO foo VALUES ('fnord')"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">sqlite_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$db</span><span style="color: #007700">, </span><span style="color: #DD0000">'select bar from foo'</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">sqlite_fetch_array</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">)); <br />} else {<br /> die(</span><span style="color: #0000BB">$sqliteerror</span><span style="color: #007700">);<br />}<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 notes" id="refsect1-function.sqlite-open-notes">
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<h3 class="title">注释</h3>
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<div class="tip"><strong class="tip">Tip</strong>
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<p class="simpara">
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On Unix platforms, SQLite is sensitive to scripts that use the fork() system call. If you
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do have such a script, it is recommended that you close the handle prior
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to forking and then re-open it in the child and/or parent.
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For more information on this issue, see
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<a href="http://sqlite.org/c_interface.html" class="link external">» The C language interface
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to the SQLite library</a> in the section entitled
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<em>Multi-Threading And SQLite</em>.
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</p>
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</div>
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<div class="tip"><strong class="tip">Tip</strong>
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<p class="simpara">
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It is not recommended to work with SQLite databases mounted on NFS
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partitions. Since NFS is notoriously bad when it comes to locking you
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may find that you cannot even open the database at all, and if it
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succeeds, the locking behaviour may be undefined.
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</p>
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</div>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<span class="simpara">
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Starting with SQLite library version 2.8.2, you can specify
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<em>:memory:</em> as the <code class="parameter">filename</code> to
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create a database that lives only in the memory of the computer.
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This is useful mostly for temporary processing, as the in-memory
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database will be destroyed when the process ends. It can also be
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useful when coupled with the <em>ATTACH DATABASE</em> SQL
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statement to load other databases and move and query data between them.
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</span>
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</p></blockquote>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<span class="simpara">
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SQLite is <a href="ini.sect.safe-mode.html#ini.safe-mode" class="link">安全模式</a> and open_basedir aware.
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</span>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.sqlite-open-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="sqlite_popen.html" class="function" rel="rdfs-seeAlso">sqlite_popen()</a> - Opens a persistent handle to an SQLite database and create the database if it does not exist</span></li>
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<li class="member"><span class="function"><a href="sqlite_close.html" class="function" rel="rdfs-seeAlso">sqlite_close()</a> - Closes an open SQLite database</span></li>
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<li class="member"><span class="function"><a href="sqlite_factory.html" class="function" rel="rdfs-seeAlso">sqlite_factory()</a> - Opens an SQLite database and returns an SQLiteDatabase object</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> |