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163 lines
9.4 KiB
HTML
163 lines
9.4 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>根据指定格式解析输入的字符</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.sscanf" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">sscanf</h1>
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<p class="verinfo">(PHP 4 >= 4.0.1, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">sscanf</span> — <span class="dc-title">根据指定格式解析输入的字符</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.sscanf-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>sscanf</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$format</code></span>
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[, <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>
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] ) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>
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<p class="para rdfs-comment">
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这个函数 <span class="function"><strong>sscanf()</strong></span> 输入类似
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<span class="function"><a href="printf.html" class="function">printf()</a></span>。 <span class="function"><strong>sscanf()</strong></span>
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读取字符串<code class="parameter">str</code> 然后根据指定格式<code class="parameter">format</code>解析, 格式的描述文档见 <span class="function"><a href="sprintf.html" class="function">sprintf()</a></span>。
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</p>
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<p class="para">
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指定的格式字符串中的任意空白匹配输入字符串的任意空白.也就是说即使是格式字符串中的一个制表符 \t 也能匹配输入
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字符串中的一个单一空格字符
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.sscanf-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">str</code></dt>
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<dd>
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<p class="para">
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将要被解析的 <span class="type"><span class="type 字符串">字符串</span></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">format</code></dt>
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<dd>
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<p class="para">
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The interpreted format for 解析<code class="parameter">str</code>的格式, 除了以下不同外，其余的见
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<span class="function"><a href="sprintf.html" class="function">sprintf()</a></span>的描述文档:
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<ul class="simplelist">
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<li class="member">
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函数不区分语言地区
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</li>
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<li class="member">
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<em>F</em>, <em>g</em>, <em>G</em> 和
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<em>b</em> 不被支持.
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</li>
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<li class="member">
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<em>D</em> 表示十进制数字.
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</li>
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<li class="member">
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<em>i</em> stands for integer with base detection.
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</li>
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<li class="member">
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<em>n</em> 代表目前已经处理的字符数。
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</li>
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<li class="member">
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<em>s</em> 遇到任意空格字符时停止读取。
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</li>
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</ul>
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</p>
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</dd>
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<dt>
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<code class="parameter">...</code></dt>
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<dd>
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<p class="para">
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可以选参数将以引用方式传入，它们的值将被设置为解析匹配的值
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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.sscanf-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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如果仅传入了两个参数给这个函数，解析后将返回一个数组，否则，如果可选参数被传入，这个函数将返回被设置了值的个数
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</p>
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<p class="para">
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如果<code class="parameter">format</code>存在的子字符串比
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<code class="parameter">str</code>内可用的多,
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<em>-1</em> 将被返回.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.sscanf-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-5951">
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<p><strong>Example #1 <span class="function"><strong>sscanf()</strong></span> 例子</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 /></span><span style="color: #FF8000">// getting the serial number<br /></span><span style="color: #007700">list(</span><span style="color: #0000BB">$serial</span><span style="color: #007700">) = </span><span style="color: #0000BB">sscanf</span><span style="color: #007700">(</span><span style="color: #DD0000">"SN/2350001"</span><span style="color: #007700">, </span><span style="color: #DD0000">"SN/%d"</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// and the date of manufacturing<br /></span><span style="color: #0000BB">$mandate </span><span style="color: #007700">= </span><span style="color: #DD0000">"January 01 2000"</span><span style="color: #007700">;<br />list(</span><span style="color: #0000BB">$month</span><span style="color: #007700">, </span><span style="color: #0000BB">$day</span><span style="color: #007700">, </span><span style="color: #0000BB">$year</span><span style="color: #007700">) = </span><span style="color: #0000BB">sscanf</span><span style="color: #007700">(</span><span style="color: #0000BB">$mandate</span><span style="color: #007700">, </span><span style="color: #DD0000">"%s %d %d"</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">"Item </span><span style="color: #0000BB">$serial</span><span style="color: #DD0000"> was manufactured on: </span><span style="color: #0000BB">$year</span><span style="color: #DD0000">-" </span><span style="color: #007700">. </span><span style="color: #0000BB">substr</span><span style="color: #007700">(</span><span style="color: #0000BB">$month</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">3</span><span style="color: #007700">) . </span><span style="color: #DD0000">"-</span><span style="color: #0000BB">$day</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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<p class="para">
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If optional parameters are passed, the function will return the
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number of assigned values.
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</p>
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<p class="para">
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<div class="example" id="example-5952">
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<p><strong>Example #2 <span class="function"><strong>sscanf()</strong></span> - using optional parameters</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// get author info and generate DocBook entry<br /></span><span style="color: #0000BB">$auth </span><span style="color: #007700">= </span><span style="color: #DD0000">"24\tLewis Carroll"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$n </span><span style="color: #007700">= </span><span style="color: #0000BB">sscanf</span><span style="color: #007700">(</span><span style="color: #0000BB">$auth</span><span style="color: #007700">, </span><span style="color: #DD0000">"%d\t%s %s"</span><span style="color: #007700">, </span><span style="color: #0000BB">$id</span><span style="color: #007700">, </span><span style="color: #0000BB">$first</span><span style="color: #007700">, </span><span style="color: #0000BB">$last</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">"<author id='</span><span style="color: #0000BB">$id</span><span style="color: #DD0000">'><br /> <firstname></span><span style="color: #0000BB">$first</span><span style="color: #DD0000"></firstname><br /> <surname></span><span style="color: #0000BB">$last</span><span style="color: #DD0000"></surname><br /></author>\n"</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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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.sscanf-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="fscanf.html" class="function" rel="rdfs-seeAlso">fscanf()</a> - 从文件中格式化输入</span></li>
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<li class="member"><span class="function"><a href="printf.html" class="function" rel="rdfs-seeAlso">printf()</a> - 输出格式化字符串</span></li>
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<li class="member"><span class="function"><a href="sprintf.html" class="function" rel="rdfs-seeAlso">sprintf()</a> - Return a formatted string</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> |