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145 lines
6.1 KiB
HTML
145 lines
6.1 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>将字符串转换为数组</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.str-split" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">str_split</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">str_split</span> — <span class="dc-title">将字符串转换为数组</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.str-split-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>str_split</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$string</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$split_length</code><span class="initializer"> = 1</span></span>
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] ) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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将一个字符串转换为数组。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.str-split-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">string</code></dt>
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<dd>
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<p class="para">
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输入字符串。
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</p>
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</dd>
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<dt>
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<code class="parameter">split_length</code></dt>
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<dd>
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<p class="para">
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每一段的长度。
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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.str-split-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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如果指定了可选的 <code class="parameter">split_length</code> 参数，返回数组中的每个元素均为一个长度为 <code class="parameter">split_length</code> 的字符块，否则每个字符块为单个字符。
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</p>
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<p class="para">
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如果 <code class="parameter">split_length</code> 小于 1，返回 <strong><code>FALSE</code></strong>。如果 <code class="parameter">split_length</code> 参数超过了 <code class="parameter">string</code> 超过了字符串 <code class="parameter">string</code> 的长度，整个字符串将作为数组仅有的一个元素返回。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.str-split-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-5960">
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<p><strong>Example #1 <span class="function"><strong>str_split()</strong></span> 使用范例</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 /><br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">"Hello Friend"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$arr1 </span><span style="color: #007700">= </span><span style="color: #0000BB">str_split</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$arr2 </span><span style="color: #007700">= </span><span style="color: #0000BB">str_split</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">, </span><span style="color: #0000BB">3</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$arr1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$arr2</span><span style="color: #007700">);<br /><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 class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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Array
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(
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[0] => H
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[1] => e
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[2] => l
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[3] => l
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[4] => o
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[5] =>
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[6] => F
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[7] => r
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[8] => i
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[9] => e
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[10] => n
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[11] => d
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)
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Array
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(
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[0] => Hel
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[1] => lo
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[2] => Fri
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[3] => end
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)
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.str-split-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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在处理多字节字符时，<span class="function"><strong>str_split()</strong></span> 会按字节数转换，而非字符数。
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.str-split-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="chunk_split.html" class="function" rel="rdfs-seeAlso">chunk_split()</a> - 将字符串分割成小块</span></li>
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<li class="member"><span class="function"><a href="preg_split.html" class="function" rel="rdfs-seeAlso">preg_split()</a> - 通过一个正则表达式分隔字符串</span></li>
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<li class="member"><span class="function"><a href="explode.html" class="function" rel="rdfs-seeAlso">explode()</a> - 使用一个字符串分割另一个字符串</span></li>
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<li class="member"><span class="function"><a href="count_chars.html" class="function" rel="rdfs-seeAlso">count_chars()</a> - 返回字符串所用字符的信息</span></li>
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<li class="member"><span class="function"><a href="str_word_count.html" class="function" rel="rdfs-seeAlso">str_word_count()</a> - 返回字符串中单词的使用情况</span></li>
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<li class="member"><a href="control_structures.for.html" class="link">for</a></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> |