mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 05:26:57 +08:00
282 lines
21 KiB
HTML
282 lines
21 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<html>
|
||
<head>
|
||
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
||
<title>Binds a PHP variable to an SQL statement parameter</title>
|
||
</head>
|
||
<body class="docs"><div id="layout">
|
||
<div id="layout-content"><div id="function.db2-bind-param" class="refentry">
|
||
<div class="refnamediv">
|
||
<h1 class="refname">db2_bind_param</h1>
|
||
<p class="verinfo">(PECL ibm_db2 >= 1.0.0)</p><p class="refpurpose"><span class="refname">db2_bind_param</span> — <span class="dc-title">
|
||
Binds a PHP variable to an SQL statement parameter
|
||
</span></p>
|
||
|
||
</div>
|
||
<div class="refsect1 description" id="refsect1-function.db2-bind-param-description">
|
||
<h3 class="title">说明</h3>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>db2_bind_param</strong></span>
|
||
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$stmt</code></span>
|
||
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$parameter_number</code></span>
|
||
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$variable_name</code></span>
|
||
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$parameter_type</code></span>
|
||
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$data_type</code><span class="initializer"> = 0</span></span>
|
||
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$precision</code><span class="initializer"> = -1</span></span>
|
||
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$scale</code><span class="initializer"> = 0</span></span>
|
||
]]]] ) : <span class="type">bool</span></div>
|
||
|
||
|
||
<p class="para rdfs-comment">
|
||
Binds a PHP variable to an SQL statement parameter in a statement resource
|
||
returned by <span class="function"><a href="db2_prepare.html" class="function">db2_prepare()</a></span>. This function gives you more
|
||
control over the parameter type, data type, precision, and scale for the
|
||
parameter than simply passing the variable as part of the optional input
|
||
array to <span class="function"><a href="db2_execute.html" class="function">db2_execute()</a></span>.
|
||
</p>
|
||
|
||
</div>
|
||
|
||
<div class="refsect1 parameters" id="refsect1-function.db2-bind-param-parameters">
|
||
<h3 class="title">参数</h3>
|
||
<p class="para">
|
||
<dl>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">stmt</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
A prepared statement returned from <span class="function"><a href="db2_prepare.html" class="function">db2_prepare()</a></span>.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">parameter_number</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Specifies the 1-indexed position of the parameter in the prepared
|
||
statement.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">variable_name</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
A string specifying the name of the PHP variable to bind to the
|
||
parameter specified by <code class="parameter">parameter_number</code>.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">parameter_type</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
A constant specifying whether the PHP variable should be bound to the
|
||
SQL parameter as an input parameter (<em>DB2_PARAM_IN</em>),
|
||
an output parameter (<em>DB2_PARAM_OUT</em>), or as a
|
||
parameter that accepts input and returns output
|
||
(<em>DB2_PARAM_INOUT</em>). To avoid memory overhead, you can
|
||
also specify <em>DB2_PARAM_FILE</em> to bind the PHP variable
|
||
to the name of a file that contains large object (BLOB, CLOB, or DBCLOB)
|
||
data.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">data_type</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
A constant specifying the SQL data type that the PHP variable should be
|
||
bound as: one of <em>DB2_BINARY</em>,
|
||
<em>DB2_CHAR</em>, <em>DB2_DOUBLE</em>, or
|
||
<em>DB2_LONG</em> .
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">precision</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Specifies the precision with which the variable should be bound to the
|
||
database. This parameter can also be used for retrieving XML output values
|
||
from stored procedures. A non-negative value specifies the maximum size of
|
||
the XML data that will be retrieved from the database. If this parameter
|
||
is not used, a default of 1MB will be assumed for retrieving the XML
|
||
output value from the stored procedure.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">scale</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Specifies the scale with which the variable should be bound to the
|
||
database.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</p>
|
||
</div>
|
||
|
||
<div class="refsect1 returnvalues" id="refsect1-function.db2-bind-param-returnvalues">
|
||
<h3 class="title">返回值</h3>
|
||
<p class="para">
|
||
成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 examples" id="refsect1-function.db2-bind-param-examples">
|
||
<h3 class="title">范例</h3>
|
||
<p class="para">
|
||
<div class="example" id="example-1230">
|
||
<p><strong>Example #1 Binding PHP variables to a prepared statement</strong></p>
|
||
<div class="example-contents"><p>
|
||
The SQL statement in the following example uses two input parameters in
|
||
the WHERE clause. We call <span class="function"><strong>db2_bind_param()</strong></span> to bind two
|
||
PHP variables to the corresponding SQL parameters. Notice that the PHP
|
||
variables do not have to be declared or assigned before the call to
|
||
<span class="function"><strong>db2_bind_param()</strong></span>; in the example,
|
||
<em>$lower_limit</em> is assigned a value before the call to
|
||
<span class="function"><strong>db2_bind_param()</strong></span>, but <em>$upper_limit</em>
|
||
is assigned a value after the call to
|
||
<span class="function"><strong>db2_bind_param()</strong></span>. The variables must be bound and, for
|
||
parameters that accept input, must have any value assigned, before calling
|
||
<span class="function"><a href="db2_execute.html" class="function">db2_execute()</a></span>.
|
||
</p></div>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br /><br />$sql </span><span style="color: #007700">= </span><span style="color: #DD0000">'SELECT name, breed, weight FROM animals<br /> WHERE weight > ? AND weight < ?'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_connect</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">, </span><span style="color: #0000BB">$user</span><span style="color: #007700">, </span><span style="color: #0000BB">$password</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #0000BB">$sql</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// We can declare the variable before calling db2_bind_param()<br /></span><span style="color: #0000BB">$lower_limit </span><span style="color: #007700">= </span><span style="color: #0000BB">1</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">db2_bind_param</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #DD0000">"lower_limit"</span><span style="color: #007700">, </span><span style="color: #0000BB">DB2_PARAM_IN</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">db2_bind_param</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #DD0000">"upper_limit"</span><span style="color: #007700">, </span><span style="color: #0000BB">DB2_PARAM_IN</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// We can also declare the variable after calling db2_bind_param()<br /></span><span style="color: #0000BB">$upper_limit </span><span style="color: #007700">= </span><span style="color: #0000BB">15.0</span><span style="color: #007700">;<br /><br />if (</span><span style="color: #0000BB">db2_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)) {<br /> while (</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_fetch_array</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)) {<br /> print </span><span style="color: #DD0000">"</span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]}</span><span style="color: #DD0000">, </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]}</span><span style="color: #DD0000">, </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">2</span><span style="color: #007700">]}</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /> }<br />}<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
<div class="example-contents"><p>以上例程会输出：</p></div>
|
||
<div class="example-contents screen">
|
||
<div class="cdata"><pre>
|
||
Pook, cat, 3.2
|
||
Rickety Ride, goat, 9.7
|
||
Peaches, dog, 12.3
|
||
</pre></div>
|
||
</div>
|
||
</div>
|
||
<div class="example" id="example-1231">
|
||
<p><strong>Example #2 Calling stored procedures with IN and OUT parameters</strong></p>
|
||
<div class="example-contents"><p>
|
||
The stored procedure match_animal in the following example accepts
|
||
three different parameters:
|
||
<ol type="1">
|
||
<li class="listitem">
|
||
<p class="para">
|
||
an input (IN) parameter that accepts the name of the first animal as
|
||
input
|
||
</p>
|
||
</li>
|
||
<li class="listitem">
|
||
<p class="para">
|
||
an input-output (INOUT) parameter that accepts the name of the second
|
||
animal as input and returns the string <em>TRUE</em> if an
|
||
animal in the database matches that name
|
||
</p>
|
||
</li>
|
||
<li class="listitem">
|
||
<p class="para">
|
||
an output (OUT) parameter that returns the sum of the weight of the
|
||
two identified animals
|
||
</p>
|
||
</li>
|
||
</ol>
|
||
In addition, the stored procedure returns a result set consisting of the
|
||
animals listed in alphabetic order starting at the animal corresponding
|
||
to the input value of the first parameter and ending at the animal
|
||
corresponding to the input value of the second parameter.
|
||
</p></div>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br /><br />$sql </span><span style="color: #007700">= </span><span style="color: #DD0000">'CALL match_animal(?, ?, ?)'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_connect</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">, </span><span style="color: #0000BB">$user</span><span style="color: #007700">, </span><span style="color: #0000BB">$password</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #0000BB">$sql</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$name </span><span style="color: #007700">= </span><span style="color: #DD0000">"Peaches"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$second_name </span><span style="color: #007700">= </span><span style="color: #DD0000">"Rickety Ride"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$weight </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">db2_bind_param</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #DD0000">"name"</span><span style="color: #007700">, </span><span style="color: #0000BB">DB2_PARAM_IN</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">db2_bind_param</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #DD0000">"second_name"</span><span style="color: #007700">, </span><span style="color: #0000BB">DB2_PARAM_INOUT</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">db2_bind_param</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">3</span><span style="color: #007700">, </span><span style="color: #DD0000">"weight"</span><span style="color: #007700">, </span><span style="color: #0000BB">DB2_PARAM_OUT</span><span style="color: #007700">);<br /><br />print </span><span style="color: #DD0000">"Values of bound parameters _before_ CALL:\n"</span><span style="color: #007700">;<br />print </span><span style="color: #DD0000">" 1: </span><span style="color: #007700">{</span><span style="color: #0000BB">$name</span><span style="color: #007700">}</span><span style="color: #DD0000"> 2: </span><span style="color: #007700">{</span><span style="color: #0000BB">$second_name</span><span style="color: #007700">}</span><span style="color: #DD0000"> 3: </span><span style="color: #007700">{</span><span style="color: #0000BB">$weight</span><span style="color: #007700">}</span><span style="color: #DD0000">\n\n"</span><span style="color: #007700">;<br /><br />if (</span><span style="color: #0000BB">db2_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)) {<br /> print </span><span style="color: #DD0000">"Values of bound parameters _after_ CALL:\n"</span><span style="color: #007700">;<br /> print </span><span style="color: #DD0000">" 1: </span><span style="color: #007700">{</span><span style="color: #0000BB">$name</span><span style="color: #007700">}</span><span style="color: #DD0000"> 2: </span><span style="color: #007700">{</span><span style="color: #0000BB">$second_name</span><span style="color: #007700">}</span><span style="color: #DD0000"> 3: </span><span style="color: #007700">{</span><span style="color: #0000BB">$weight</span><span style="color: #007700">}</span><span style="color: #DD0000">\n\n"</span><span style="color: #007700">;<br /><br /> print </span><span style="color: #DD0000">"Results:\n"</span><span style="color: #007700">;<br /> while (</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_fetch_array</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)) {<br /> print </span><span style="color: #DD0000">" </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]}</span><span style="color: #DD0000">, </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]}</span><span style="color: #DD0000">, </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">2</span><span style="color: #007700">]}</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /> }<br />}<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
<div class="example-contents"><p>以上例程会输出：</p></div>
|
||
<div class="example-contents screen">
|
||
<div class="cdata"><pre>
|
||
Values of bound parameters _before_ CALL:
|
||
1: Peaches 2: Rickety Ride 3: 0
|
||
|
||
Values of bound parameters _after_ CALL:
|
||
1: Peaches 2: TRUE 3: 22
|
||
|
||
Results:
|
||
Peaches, dog, 12.3
|
||
Pook, cat, 3.2
|
||
Rickety Ride, goat, 9.7
|
||
</pre></div>
|
||
</div>
|
||
</div>
|
||
<div class="example" id="example-1232">
|
||
<p><strong>Example #3 Inserting a binary large object (BLOB) directly from a file</strong></p>
|
||
<div class="example-contents"><p>
|
||
The data for large objects are typically stored in files, such as XML
|
||
documents or audio files. Rather than reading an entire file into a PHP
|
||
variable, and then binding that PHP variable into an SQL statement, you
|
||
can avoid some memory overhead by binding the file directly to the input
|
||
parameter of your SQL statement. The following example demonstrates how
|
||
to bind a file directly into a BLOB column.
|
||
</p></div>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br />$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"INSERT INTO animal_pictures(picture) VALUES (?)"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$picture </span><span style="color: #007700">= </span><span style="color: #DD0000">"/opt/albums/spook/grooming.jpg"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$rc </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_bind_param</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #DD0000">"picture"</span><span style="color: #007700">, </span><span style="color: #0000BB">DB2_PARAM_FILE</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$rc </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
</div>
|
||
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 seealso" id="refsect1-function.db2-bind-param-seealso">
|
||
<h3 class="title">参见</h3>
|
||
<p class="para">
|
||
<ul class="simplelist">
|
||
<li class="member"><span class="function"><a href="db2_execute.html" class="function" rel="rdfs-seeAlso">db2_execute()</a> - Executes a prepared SQL statement</span></li>
|
||
<li class="member"><span class="function"><a href="db2_prepare.html" class="function" rel="rdfs-seeAlso">db2_prepare()</a> - Prepares an SQL statement to be executed</span></li>
|
||
</ul>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
</div></div></div></body></html> |