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123 lines
6.2 KiB
HTML
123 lines
6.2 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>Escape a identifier for insertion into a text 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.pg-escape-identifier" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pg_escape_identifier</h1>
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<p class="verinfo">(PHP 5 >= 5.4.4, PHP 7)</p><p class="refpurpose"><span class="refname">pg_escape_identifier</span> — <span class="dc-title">
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Escape a identifier for insertion into a text field
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.pg-escape-identifier-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>pg_escape_identifier</strong></span>
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([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
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], <span class="methodparam"><span class="type">string</span> <code class="parameter">$data</code></span>
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) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>pg_escape_identifier()</strong></span> escapes a identifier
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(e.g. table, field names) for quering the database. It returns an
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escaped identifier string for PostgreSQL
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server. <span class="function"><strong>pg_escape_identifier()</strong></span> adds double
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quotes before and after data. Users should not add double
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quotes. Use of this function is recommended for identifier
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parameters in query. For SQL literals (i.e. parameters except
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bytea), <span class="function"><a href="pg_escape_literal.html" class="function">pg_escape_literal()</a></span>
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or <span class="function"><a href="pg_escape_string.html" class="function">pg_escape_string()</a></span> must be used. For bytea
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type fields, <span class="function"><a href="pg_escape_bytea.html" class="function">pg_escape_bytea()</a></span> must be used
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instead.
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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">
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This function has internal escape code and can also be used with
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PostgreSQL 8.4 or less.
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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.pg-escape-identifier-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">connection</code></dt>
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<dd>
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<p class="para">
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PostgreSQL database connection resource. When
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<code class="parameter">connection</code> is not present, the default connection
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is used. The default connection is the last connection made by
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<span class="function"><a href="pg_connect.html" class="function">pg_connect()</a></span> or <span class="function"><a href="pg_pconnect.html" class="function">pg_pconnect()</a></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">data</code></dt>
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<dd>
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<p class="para">
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A <span class="type"><a href="language.types.string.html" class="type string">string</a></span> containing text to be escaped.
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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.pg-escape-identifier-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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A <span class="type"><a href="language.types.string.html" class="type string">string</a></span> containing the escaped data.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.pg-escape-identifier-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-2484">
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<p><strong>Example #1 <span class="function"><strong>pg_escape_identifier()</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 the database<br /> </span><span style="color: #0000BB">$dbconn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'dbname=foo'</span><span style="color: #007700">);<br /> <br /> </span><span style="color: #FF8000">// Escape the table name data<br /> </span><span style="color: #0000BB">$escaped </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_escape_identifier</span><span style="color: #007700">(</span><span style="color: #0000BB">$table_name</span><span style="color: #007700">);<br /> <br /> </span><span style="color: #FF8000">// Select rows from $table_name<br /> </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT * FROM </span><span style="color: #007700">{</span><span style="color: #0000BB">$escaped</span><span style="color: #007700">}</span><span style="color: #DD0000">;"</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.pg-escape-identifier-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="pg_escape_literal.html" class="function" rel="rdfs-seeAlso">pg_escape_literal()</a> - Escape a literal for insertion into a text field</span></li>
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<li class="member"><span class="function"><a href="pg_escape_bytea.html" class="function" rel="rdfs-seeAlso">pg_escape_bytea()</a> - 转义 bytea 类型的二进制数据</span></li>
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<li class="member"><span class="function"><a href="pg_escape_string.html" class="function" rel="rdfs-seeAlso">pg_escape_string()</a> - 转义 text/char 类型的字符串</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> |