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- <title>合并一个或多个数组</title>
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- </div><hr /><div id="function.array-merge" class="refentry">
- <div class="refnamediv">
- <h1 class="refname">array_merge</h1>
- <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">array_merge</span> — <span class="dc-title">合并一个或多个数组</span></p>
- </div>
- <div class="refsect1 description" id="refsect1-function.array-merge-description">
- <h3 class="title">说明</h3>
- <div class="methodsynopsis dc-description">
- <span class="type">array</span> <span class="methodname"><strong>array_merge</strong></span>
- ( <span class="methodparam"><span class="type">array</span> <code class="parameter">$array1</code></span>
- [, <span class="methodparam"><span class="type">array</span> <code class="parameter">$...</code></span>
- ] )</div>
- <p class="para rdfs-comment">
- <span class="function"><strong>array_merge()</strong></span> 将一个或多个数组的单元合并起来,一个数组中的值附加在前一个数组的后面。返回作为结果的数组。
- </p>
- <p class="para">
- 如果输入的数组中有相同的字符串键名,则该键名后面的值将覆盖前一个值。然而,如果数组包含数字键名,后面的值将<em class="emphasis">不会</em>覆盖原来的值,而是附加到后面。
- </p>
- <p class="para">
- 如果只给了一个数组并且该数组是数字索引的,则键名会以连续方式重新索引。
- </p>
- </div>
- <div class="refsect1 parameters" id="refsect1-function.array-merge-parameters">
- <h3 class="title">参数</h3>
- <p class="para">
- <dl>
- <dt>
- <span class="term"><em><code class="parameter">array1</code></em></span>
- <dd>
- <p class="para">
- Initial array to merge.
- </p>
- </dd>
- </dt>
- <dt>
- <span class="term"><em><code class="parameter">...</code></em></span>
- <dd>
- <p class="para">
- Variable list of arrays to merge.
- </p>
- </dd>
- </dt>
- </dl>
- </p>
- </div>
- <div class="refsect1 returnvalues" id="refsect1-function.array-merge-returnvalues">
- <h3 class="title">返回值</h3>
- <p class="para">
- 返回结果数组。
- </p>
- </div>
- <div class="refsect1 changelog" id="refsect1-function.array-merge-changelog">
- <h3 class="title">更新日志</h3>
- <p class="para">
- <table class="doctable informaltable">
-
- <thead>
- <tr>
- <th>版本</th>
- <th>说明</th>
- </tr>
- </thead>
- <tbody class="tbody">
- <tr>
- <td>5.0.0</td>
- <td>
- <div class="warning"><strong class="warning">Warning</strong>
- <p class="para">
- <span class="function"><strong>array_merge()</strong></span> 的行为在 PHP 5 中被修改了。和 PHP 4
- 不同, <span class="function"><strong>array_merge()</strong></span> 现在只接受
- <span class="type"><a href="language.types.array.html" class="type array">array</a></span> 类型的参数。不过可以用强制转换来合并其它类型。请看下面的例子。
- </p>
- <p class="para">
- <div class="example" id="example-4719">
- <p><strong>Example #1 <span class="function"><strong>array_merge()</strong></span> PHP 5 例子</strong></p>
- <div class="example-contents">
- <div class="phpcode"><code><span style="color: #000000">
- <span style="color: #0000BB"><?php<br />$beginning </span><span style="color: #007700">= </span><span style="color: #DD0000">'foo'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$end </span><span style="color: #007700">= array(</span><span style="color: #0000BB">1 </span><span style="color: #007700">=> </span><span style="color: #DD0000">'bar'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">array_merge</span><span style="color: #007700">((array)</span><span style="color: #0000BB">$beginning</span><span style="color: #007700">, (array)</span><span style="color: #0000BB">$end</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
- </span>
- </code></div>
- </div>
- <div class="example-contents"><p>以上例程会输出:</p></div>
- <div class="example-contents screen">
- <div class="cdata"><pre>
- Array
- (
- [0] => foo
- [1] => bar
- )
- </pre></div>
- </div>
- </div>
- </p>
- </div>
- </td>
- </tr>
- </tbody>
-
- </table>
- </p>
- </div>
- <div class="refsect1 examples" id="refsect1-function.array-merge-examples">
- <h3 class="title">范例</h3>
- <p class="para">
- <div class="example" id="example-4720">
- <p><strong>Example #2 <span class="function"><strong>array_merge()</strong></span> 例子</strong></p>
- <div class="example-contents">
- <div class="phpcode"><code><span style="color: #000000">
- <span style="color: #0000BB"><?php<br />$array1 </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"color" </span><span style="color: #007700">=> </span><span style="color: #DD0000">"red"</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">4</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$array2 </span><span style="color: #007700">= array(</span><span style="color: #DD0000">"a"</span><span style="color: #007700">, </span><span style="color: #DD0000">"b"</span><span style="color: #007700">, </span><span style="color: #DD0000">"color" </span><span style="color: #007700">=> </span><span style="color: #DD0000">"green"</span><span style="color: #007700">, </span><span style="color: #DD0000">"shape" </span><span style="color: #007700">=> </span><span style="color: #DD0000">"trapezoid"</span><span style="color: #007700">, </span><span style="color: #0000BB">4</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">array_merge</span><span style="color: #007700">(</span><span style="color: #0000BB">$array1</span><span style="color: #007700">, </span><span style="color: #0000BB">$array2</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
- </span>
- </code></div>
- </div>
- <div class="example-contents"><p>以上例程会输出:</p></div>
- <div class="example-contents screen">
- <div class="cdata"><pre>
- Array
- (
- [color] => green
- [0] => 2
- [1] => 4
- [2] => a
- [3] => b
- [shape] => trapezoid
- [4] => 4
- )
- </pre></div>
- </div>
- </div>
- </p>
- <p class="para">
- <div class="example" id="example-4721">
- <p><strong>Example #3 Simple <span class="function"><strong>array_merge()</strong></span> 例子</strong></p>
- <div class="example-contents">
- <div class="phpcode"><code><span style="color: #000000">
- <span style="color: #0000BB"><?php<br />$array1 </span><span style="color: #007700">= array();<br /></span><span style="color: #0000BB">$array2 </span><span style="color: #007700">= array(</span><span style="color: #0000BB">1 </span><span style="color: #007700">=> </span><span style="color: #DD0000">"data"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">array_merge</span><span style="color: #007700">(</span><span style="color: #0000BB">$array1</span><span style="color: #007700">, </span><span style="color: #0000BB">$array2</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
- </span>
- </code></div>
- </div>
- <div class="example-contents"><p>
- 别忘了数字键名将会被重新编号!
- </p></div>
- <div class="example-contents screen">
- <div class="cdata"><pre>
- Array
- (
- [0] => data
- )
- </pre></div>
- </div>
- <div class="example-contents"><p>
- 如果你想完全保留原有数组并只想新的数组附加到后面,用 <em>+</em> 运算符:
- </p></div>
- <div class="example-contents">
- <div class="phpcode"><code><span style="color: #000000">
- <span style="color: #0000BB"><?php<br />$array1 </span><span style="color: #007700">= array(</span><span style="color: #0000BB">0 </span><span style="color: #007700">=> </span><span style="color: #DD0000">'zero_a'</span><span style="color: #007700">, </span><span style="color: #0000BB">2 </span><span style="color: #007700">=> </span><span style="color: #DD0000">'two_a'</span><span style="color: #007700">, </span><span style="color: #0000BB">3 </span><span style="color: #007700">=> </span><span style="color: #DD0000">'three_a'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$array2 </span><span style="color: #007700">= array(</span><span style="color: #0000BB">1 </span><span style="color: #007700">=> </span><span style="color: #DD0000">'one_b'</span><span style="color: #007700">, </span><span style="color: #0000BB">3 </span><span style="color: #007700">=> </span><span style="color: #DD0000">'three_b'</span><span style="color: #007700">, </span><span style="color: #0000BB">4 </span><span style="color: #007700">=> </span><span style="color: #DD0000">'four_b'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$array1 </span><span style="color: #007700">+ </span><span style="color: #0000BB">$array2</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 keys from the first array will be preserved. If an array key
- exists in both arrays, then the element from the first array will
- be used and the matching key's element from the second array will
- be ignored.
- </p></div>
- <div class="example-contents screen">
- <div class="cdata"><pre>
- array(5) {
- [0]=>
- string(6) "zero_a"
- [2]=>
- string(5) "two_a"
- [3]=>
- string(7) "three_a"
- [1]=>
- string(5) "one_b"
- [4]=>
- string(6) "four_b"
- }
- </pre></div>
- </div>
- </div>
- </p>
- </div>
- <div class="refsect1 seealso" id="refsect1-function.array-merge-seealso">
- <h3 class="title">参见</h3>
- <p class="para">
- <ul class="simplelist">
- <li class="member"> <span class="function"><a href="function.array-merge-recursive.html" class="function" rel="rdfs-seeAlso">array_merge_recursive()</a> - 递归地合并一个或多个数组</span></li>
- <li class="member"> <span class="function"><a href="function.array-combine.html" class="function" rel="rdfs-seeAlso">array_combine()</a> - 创建一个数组,用一个数组的值作为其键名,另一个数组的值作为其值</span></li>
- <li class="member"><a href="language.operators.array.html" class="link">array operators</a></li>
- </ul>
- </p>
- </div>
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