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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Returns an array containing all of the result set rows</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="pdostatement.fetch.html">PDOStatement->fetch</a></div> <div class="next" style="text-align: right; float: right;"><a href="pdostatement.fetchcolumn.html">PDOStatement->fetchColumn</a></div> <div class="up"><a href="class.pdostatement.html">PDOStatement</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="pdostatement.fetchall" class="refentry"> <div class="refnamediv"> <h1 class="refname">PDOStatement->fetchAll</h1> <p class="verinfo">(No version information available, might be only in CVS)</p><p class="refpurpose"><span class="refname">PDOStatement->fetchAll</span> — <span class="dc-title"> Returns an array containing all of the result set rows </span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>PDOStatement::fetchAll</b></b></span> ([ <span class="methodparam"><span class="type">int</span> <tt class="parameter">$fetch_style</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$column_index</tt></span> [, <span class="methodparam"><span class="type">array</span> <tt class="parameter">$ctor_args</tt></span> ]]] )</div> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">fetch_style</tt></i></span> <dd> <p class="para"> Controls the contents of the returned array as documented in <a href="pdostatement.fetch.html" class="function">PDOStatement::fetch()</a>. Defaults to <i>PDO::FETCH_BOTH</i>. </p> <p class="para"> To return an array consisting of all values of a single column from the result set, specify <i>PDO::FETCH_COLUMN</i>. You can specify which column you want with the <i><tt class="parameter">column-index</tt></i> parameter. </p> <p class="para"> To fetch only the unique values of a single column from the result set, bitwise-OR <i>PDO::FETCH_COLUMN</i> with <i>PDO::FETCH_UNIQUE</i>. </p> <p class="para"> To return an associative array grouped by the values of a specified column, bitwise-OR <i>PDO::FETCH_COLUMN</i> with <i>PDO::FETCH_GROUP</i>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">column_index</tt></i></span> <dd> <p class="para"> Returns the indicated 0-indexed column when the value of <i><tt class="parameter">fetch_style</tt></i> is <i>PDO::FETCH_COLUMN</i>. Defaults to <i>0</i>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">ctor_args</tt></i></span> <dd> <p class="para"> Arguments of custom class constructor. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> <b>PDOStatement::fetchAll()</b> returns an array containing all of the remaining rows in the result set. The array represents each row as either an array of column values or an object with properties corresponding to each column name. </p> <p class="para"> Using this method to fetch large result sets will result in a heavy demand on system and possibly network resources. Rather than retrieving all of the data and manipulating it in PHP, consider using the database server to manipulate the result sets. For example, use the WHERE and SORT BY clauses in SQL to restrict results before retrieving and processing them with PHP. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"><p><b>Example #1 Fetch all remaining rows in a result set</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$sth </span><span style="color: #007700">= </span><span style="color: #0000BB">$dbh</span><span style="color: #007700">-></span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT name, colour FROM fruit"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* Fetch all of the remaining rows in the result set */<br /></span><span style="color: #007700">print(</span><span style="color: #DD0000">"Fetch all of the remaining rows in the result set:\n"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">fetchAll</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>Fetch all of the remaining rows in the result set:Array( [0] => Array ( [NAME] => pear [0] => pear [COLOUR] => green [1] => green ) [1] => Array ( [NAME] => watermelon [0] => watermelon [COLOUR] => pink [1] => pink ))</pre></div> </pre></div> </div> <div class="example"><p><b>Example #2 Fetching all values of a single column from a result set</b></p> <div class="example-contents"><p> The following example demonstrates how to return all of the values of a single column from a result set, even though the SQL statement itself may return multiple columns per row. </p></div> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$sth </span><span style="color: #007700">= </span><span style="color: #0000BB">$dbh</span><span style="color: #007700">-></span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT name, colour FROM fruit"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* Fetch all of the values of the first column */<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">fetchAll</span><span style="color: #007700">(</span><span style="color: #0000BB">PDO</span><span style="color: #007700">::</span><span style="color: #0000BB">FETCH_COLUMN</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>Array(3)( [0] => string(5) => apple [1] => string(4) => pear [2] => string(10) => watermelon)</pre></div> </pre></div> </div> <div class="example"><p><b>Example #3 Grouping all values by a single column</b></p> <div class="example-contents"><p> The following example demonstrates how to return an associative array grouped by the values of the specified column in the result set. The array contains three keys: values <i>apple</i> and <i>pear</i> are returned as arrays that contain two different colours, while <i>watermelon</i> is returned as an array that contains only one colour. </p></div> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$insert </span><span style="color: #007700">= </span><span style="color: #0000BB">$dbh</span><span style="color: #007700">-></span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">"INSERT INTO fruit(name, colour) VALUES (?, ?)"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$insert</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">(</span><span style="color: #DD0000">'apple'</span><span style="color: #007700">, </span><span style="color: #DD0000">'green'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$insert</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">(</span><span style="color: #DD0000">'pear'</span><span style="color: #007700">, </span><span style="color: #DD0000">'yellow'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$sth </span><span style="color: #007700">= </span><span style="color: #0000BB">$dbh</span><span style="color: #007700">-></span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT name, colour FROM fruit"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* Group values by the first column */<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$sth</span><span style="color: #007700">-></span><span style="color: #0000BB">fetchAll</span><span style="color: #007700">(</span><span style="color: #0000BB">PDO</span><span style="color: #007700">::</span><span style="color: #0000BB">FETCH_COLUMN</span><span style="color: #007700">|</span><span style="color: #0000BB">PDO</span><span style="color: #007700">::</span><span style="color: #0000BB">FETCH_GROUP</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>array(3) { ["apple"]=> array(2) { [0]=> string(5) "green" [1]=> string(3) "red" } ["pear"]=> array(2) { [0]=> string(5) "green" [1]=> string(6) "yellow" } ["watermelon"]=> array(1) { [0]=> string(5) "green" }}</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="pdo.query.html" class="function" rel="rdfs-seeAlso">PDO::query()</a></li> <li class="member"><a href="pdostatement.fetch.html" class="function" rel="rdfs-seeAlso">PDOStatement::fetch()</a></li> <li class="member"><a href="pdostatement.fetchcolumn.html" class="function" rel="rdfs-seeAlso">PDOStatement::fetchColumn()</a></li> <li class="member"><a href="pdo.prepare.html" class="function" rel="rdfs-seeAlso">PDO::prepare()</a></li> <li class="member"><a href="pdostatement.setfetchmode.html" class="function" rel="rdfs-seeAlso">PDOStatement::setFetchMode()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="pdostatement.fetch.html">PDOStatement->fetch</a></div> <div class="next" style="text-align: right; float: right;"><a href="pdostatement.fetchcolumn.html">PDOStatement->fetchColumn</a></div> <div class="up"><a href="class.pdostatement.html">PDOStatement</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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