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212 lines
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HTML
212 lines
8.6 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>以千位分隔符方式格式化一个数字</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.number-format" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">number_format</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">number_format</span> — <span class="dc-title">以千位分隔符方式格式化一个数字</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.number-format-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>number_format</strong></span>
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( <span class="methodparam"><span class="type">float</span> <code class="parameter">$number</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$decimals</code><span class="initializer"> = 0</span></span>
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] ) : <span class="type">string</span></div>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>number_format</strong></span>
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( <span class="methodparam"><span class="type">float</span> <code class="parameter">$number</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$decimals</code><span class="initializer"> = 0</span></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$dec_point</code><span class="initializer"> = "."</span></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$thousands_sep</code><span class="initializer"> = ","</span></span>
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) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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本函数可以接受1个、2个或者4个参数（注意：不能是3个）:
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</p>
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<p class="para">
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如果只提供第一个参数，<code class="parameter">number</code>的小数部分会被去掉
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并且每个千位分隔符都是英文小写逗号","
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</p>
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<p class="para">
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如果提供两个参数，<code class="parameter">number</code>将保留小数点后的位数到你设定的值，其余同楼上
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</p>
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<p class="para">
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如果提供了四个参数，<code class="parameter">number</code>
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将保留<code class="parameter">decimals</code>个长度的小数部分,
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小数点被替换为<code class="parameter">dec_point</code>，千位分隔符替换为<code class="parameter">thousands_sep</code>
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.number-format-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">number</code></dt>
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<dd>
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<p class="para">
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你要格式化的数字
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</p>
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</dd>
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<dt>
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<code class="parameter">decimals</code></dt>
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<dd>
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<p class="para">
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要保留的小数位数
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</p>
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</dd>
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<dt>
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<code class="parameter">dec_point</code></dt>
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<dd>
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<p class="para">
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指定小数点显示的字符
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</p>
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</dd>
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<dt>
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<code class="parameter">thousands_sep</code></dt>
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<dd>
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<p class="para">
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指定千位分隔符显示的字符
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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.number-format-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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格式化以后的 <code class="parameter">number</code>.
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.number-format-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>5.4.0</td>
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<td>
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This function now supports multiple bytes in
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<code class="parameter">dec_point</code> and
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<code class="parameter">thousands_sep</code>. Only the first byte of each
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separator was used in older versions.
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.number-format-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-5928">
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<p><strong>Example #1 <span class="function"><strong>number_format()</strong></span> Example</strong></p>
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<div class="example-contents"><p>
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For instance, French notation usually use two decimals,
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comma (',') as decimal separator, and space (' ') as
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thousand separator. The following example demonstrates various way to format a number:
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</p></div>
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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 />$number </span><span style="color: #007700">= </span><span style="color: #0000BB">1234.56</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// english notation (default)<br /></span><span style="color: #0000BB">$english_format_number </span><span style="color: #007700">= </span><span style="color: #0000BB">number_format</span><span style="color: #007700">(</span><span style="color: #0000BB">$number</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// 1,235<br /><br />// French notation<br /></span><span style="color: #0000BB">$nombre_format_francais </span><span style="color: #007700">= </span><span style="color: #0000BB">number_format</span><span style="color: #007700">(</span><span style="color: #0000BB">$number</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #DD0000">','</span><span style="color: #007700">, </span><span style="color: #DD0000">' '</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// 1 234,56<br /><br /></span><span style="color: #0000BB">$number </span><span style="color: #007700">= </span><span style="color: #0000BB">1234.5678</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// english notation without thousands separator<br /></span><span style="color: #0000BB">$english_format_number </span><span style="color: #007700">= </span><span style="color: #0000BB">number_format</span><span style="color: #007700">(</span><span style="color: #0000BB">$number</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #DD0000">'.'</span><span style="color: #007700">, </span><span style="color: #DD0000">''</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">// 1234.57<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>
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.number-format-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>7.2.0</td>
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<td>
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<span class="function"><strong>number_format()</strong></span> 现在无法返回 <em>-0</em>，之前可能返回 <em>-0</em>，因为 <code class="parameter">number</code> 可能会是 <em>-0.01</em>。
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.number-format-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="money_format.html" class="function" rel="rdfs-seeAlso">money_format()</a> - 将数字格式化成货币字符串</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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<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="sscanf.html" class="function" rel="rdfs-seeAlso">sscanf()</a> - 根据指定格式解析输入的字符</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> |