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112 lines
5.7 KiB
HTML
112 lines
5.7 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>Get len bytes data from open blob</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.ibase-blob-get" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">ibase_blob_get</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">ibase_blob_get</span> — <span class="dc-title">Get len bytes data from open blob</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.ibase-blob-get-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>ibase_blob_get</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$blob_handle</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$len</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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This function returns at most <code class="parameter">len</code> bytes from a BLOB
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that has been opened for reading by <span class="function"><a href="ibase_blob_open.html" class="function">ibase_blob_open()</a></span>.
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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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It is not possible to read from a BLOB that has been opened for writing
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by <span class="function"><a href="ibase_blob_create.html" class="function">ibase_blob_create()</a></span>.
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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.ibase-blob-get-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">blob_handle</code></dt>
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<dd>
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<p class="para">
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A BLOB handle opened with <span class="function"><a href="ibase_blob_open.html" class="function">ibase_blob_open()</a></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">len</code></dt>
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<dd>
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<p class="para">
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Size of returned data.
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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.ibase-blob-get-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns at most <code class="parameter">len</code> bytes from the BLOB, or <strong><code>FALSE</code></strong>
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on failure.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.ibase-blob-get-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-1194">
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<p><strong>Example #1 <span class="function"><strong>ibase_blob_get()</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 />$result </span><span style="color: #007700">= </span><span style="color: #0000BB">ibase_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT blob_value FROM table"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$data </span><span style="color: #007700">= </span><span style="color: #0000BB">ibase_fetch_object</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$blob_data </span><span style="color: #007700">= </span><span style="color: #0000BB">ibase_blob_info</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">-></span><span style="color: #0000BB">BLOB_VALUE</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$blob_hndl </span><span style="color: #007700">= </span><span style="color: #0000BB">ibase_blob_open</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">-></span><span style="color: #0000BB">BLOB_VALUE</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">ibase_blob_get</span><span style="color: #007700">(</span><span style="color: #0000BB">$blob_hndl</span><span style="color: #007700">, </span><span style="color: #0000BB">$blob_data</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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Whilst this example doesn't do much more than a
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'ibase_blob_echo($data->BLOB_VALUE)' would do, it does show you how to get
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information into a $variable to manipulate as you please.
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.ibase-blob-get-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="ibase_blob_open.html" class="function" rel="rdfs-seeAlso">ibase_blob_open()</a> - Open blob for retrieving data parts</span></li>
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<li class="member"><span class="function"><a href="ibase_blob_close.html" class="function" rel="rdfs-seeAlso">ibase_blob_close()</a> - Close blob</span></li>
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<li class="member"><span class="function"><a href="ibase_blob_echo.html" class="function" rel="rdfs-seeAlso">ibase_blob_echo()</a> - Output blob contents to browser</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> |