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<title>Binds variables to a prepared statement as parameters</title>
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<h1 class="refname">mysqli_stmt::bind_param</h1>
<h1 class="refname">mysqli_stmt_bind_param</h1>
<p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">mysqli_stmt::bind_param</span> -- <span class="refname">mysqli_stmt_bind_param</span> — <span class="dc-title">Binds variables to a prepared statement as parameters</span></p>
</div>
<div class="refsect1 description" id="refsect1-mysqli-stmt.bind-param-description">
<h3 class="title">Description</h3>
<p class="para">Object oriented style</p>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>mysqli_stmt::bind_param</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$types</code></span>
, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter reference">&$var1</code></span>
[, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter reference">&$...</code></span>
] )</div>
<p class="para rdfs-comment">Procedural style</p>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>mysqli_stmt_bind_param</strong></span>
( <span class="methodparam"><span class="type"><a href="class.mysqli-stmt.html" class="type mysqli_stmt">mysqli_stmt</a></span> <code class="parameter">$stmt</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$types</code></span>
, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter reference">&$var1</code></span>
[, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter reference">&$...</code></span>
] )</div>
<p class="para rdfs-comment">
Bind variables for the parameter markers in the SQL statement that was
passed to <span class="function"><a href="mysqli.prepare.html" class="function">mysqli_prepare()</a></span>.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
If data size of a variable exceeds max. allowed packet size
(max_allowed_packet), you have to specify <em>b</em> in
<em><code class="parameter">types</code></em> and use
<span class="function"><a href="mysqli-stmt.send-long-data.html" class="function">mysqli_stmt_send_long_data()</a></span> to send the data in packets.
</p>
</p></blockquote>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
Care must be taken when using <span class="function"><strong>mysqli_stmt_bind_param()</strong></span> in conjunction
with <span class="function"><a href="function.call-user-func-array.html" class="function">call_user_func_array()</a></span>. Note that <span class="function"><strong>mysqli_stmt_bind_param()</strong></span>
requires parameters to be passed by reference, whereas <span class="function"><a href="function.call-user-func-array.html" class="function">call_user_func_array()</a></span>
can accept as a parameter a list of variables that can represent references or values.
</p>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-mysqli-stmt.bind-param-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">
stmt</code></em></span><dd>
<p class="para">Procedural style only: A statement identifier
returned by <span class="function"><a href="mysqli.stmt-init.html" class="function">mysqli_stmt_init()</a></span>.</p></dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">types</code></em></span>
<dd>
<p class="para">
A string that contains one or more characters which specify the types
for the corresponding bind variables:
<table class="doctable table">
<caption><strong>Type specification chars</strong></caption>
<thead>
<tr>
<th>Character</th>
<th>Description</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>i</td>
<td>corresponding variable has type integer</td>
</tr>
<tr>
<td>d</td>
<td>corresponding variable has type double</td>
</tr>
<tr>
<td>s</td>
<td>corresponding variable has type string</td>
</tr>
<tr>
<td>b</td>
<td>corresponding variable is a blob and will be sent in packets</td>
</tr>
</tbody>
</table>
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">var1</code></em></span>
<dd>
<p class="para">
The number of variables and length of string
<em><code class="parameter">types</code></em> must match the parameters in the statement.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-mysqli-stmt.bind-param-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-mysqli-stmt.bind-param-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-1692">
<p><strong>Example #1 Object oriented style</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$mysqli </span><span style="color: #007700">= new </span><span style="color: #0000BB">mysqli</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #DD0000">'my_user'</span><span style="color: #007700">, </span><span style="color: #DD0000">'my_password'</span><span style="color: #007700">, </span><span style="color: #DD0000">'world'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">mysqli_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqli_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">"INSERT INTO CountryLanguage VALUES (?, ?, ?, ?)"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-></span><span style="color: #0000BB">bind_param</span><span style="color: #007700">(</span><span style="color: #DD0000">'sssd'</span><span style="color: #007700">, </span><span style="color: #0000BB">$code</span><span style="color: #007700">, </span><span style="color: #0000BB">$language</span><span style="color: #007700">, </span><span style="color: #0000BB">$official</span><span style="color: #007700">, </span><span style="color: #0000BB">$percent</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$code </span><span style="color: #007700">= </span><span style="color: #DD0000">'DEU'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$language </span><span style="color: #007700">= </span><span style="color: #DD0000">'Bavarian'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$official </span><span style="color: #007700">= </span><span style="color: #DD0000">"F"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$percent </span><span style="color: #007700">= </span><span style="color: #0000BB">11.2</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">/* execute prepared statement */<br /></span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%d Row inserted.\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-></span><span style="color: #0000BB">affected_rows</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* close statement and connection */<br /></span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* Clean up table CountryLanguage */<br /></span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"DELETE FROM CountryLanguage WHERE Language='Bavarian'"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%d Row deleted.\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">affected_rows</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
<div class="example" id="example-1693">
<p><strong>Example #2 Procedural style</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">mysqli_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #DD0000">'my_user'</span><span style="color: #007700">, </span><span style="color: #DD0000">'my_password'</span><span style="color: #007700">, </span><span style="color: #DD0000">'world'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">$link</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqli_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">mysqli_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"INSERT INTO CountryLanguage VALUES (?, ?, ?, ?)"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">mysqli_stmt_bind_param</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #DD0000">'sssd'</span><span style="color: #007700">, </span><span style="color: #0000BB">$code</span><span style="color: #007700">, </span><span style="color: #0000BB">$language</span><span style="color: #007700">, </span><span style="color: #0000BB">$official</span><span style="color: #007700">, </span><span style="color: #0000BB">$percent</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$code </span><span style="color: #007700">= </span><span style="color: #DD0000">'DEU'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$language </span><span style="color: #007700">= </span><span style="color: #DD0000">'Bavarian'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$official </span><span style="color: #007700">= </span><span style="color: #DD0000">"F"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$percent </span><span style="color: #007700">= </span><span style="color: #0000BB">11.2</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">/* execute prepared statement */<br /></span><span style="color: #0000BB">mysqli_stmt_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%d Row inserted.\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqli_stmt_affected_rows</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">/* close statement and connection */<br /></span><span style="color: #0000BB">mysqli_stmt_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Clean up table CountryLanguage */<br /></span><span style="color: #0000BB">mysqli_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"DELETE FROM CountryLanguage WHERE Language='Bavarian'"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%d Row deleted.\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">mysqli_affected_rows</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">mysqli_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above examples will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
1 Row inserted.
1 Row deleted.
</pre></div>
</div>
</div>
</div>
<div class="refsect1 seealso" id="refsect1-mysqli-stmt.bind-param-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="mysqli-stmt.bind-result.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_bind_result()</a> - Binds variables to a prepared statement for result storage</span></li>
<li class="member"> <span class="function"><a href="mysqli-stmt.execute.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_execute()</a> - Executes a prepared Query</span></li>
<li class="member"> <span class="function"><a href="mysqli-stmt.fetch.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_fetch()</a> - Fetch results from a prepared statement into the bound variables</span></li>
<li class="member"> <span class="function"><a href="mysqli.prepare.html" class="function" rel="rdfs-seeAlso">mysqli_prepare()</a> - Prepare an SQL statement for execution</span></li>
<li class="member"> <span class="function"><a href="mysqli-stmt.send-long-data.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_send_long_data()</a> - Send data in blocks</span></li>
<li class="member"> <span class="function"><a href="mysqli-stmt.errno.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_errno()</a> - Returns the error code for the most recent statement call</span></li>
<li class="member"> <span class="function"><a href="mysqli-stmt.error.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_error()</a> - Returns a string description for last statement error</span></li>
</ul>
</p>
</div>
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