doubleval

名前:doubleval

カテゴリ:可変処理

対応言語:php

一言説明:floatval（）のエイリアス。

例

異なる変数の浮動小数点値を返します：

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"1234.56789"</span> <span class="token punctuation">;</span>
<span class="token keyword">Echo</span> <span class="token function">doubleval</span> <span class="token punctuation">（</span> <span class="token variable">$ a</span> <span class="token punctuation">）</span> <span class="token operator">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>

<span class="token variable">$ b</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"1234.56789hello"</span> <span class="token punctuation">;</span>
<span class="token keyword">Echo</span> <span class="token function">doubleval</span> <span class="token punctuation">（</span> <span class="token variable">$ b</span> <span class="token punctuation">）</span> <span class="token operator">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>

<span class="token variable">$ c</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"hello1234.56789"</span> <span class="token punctuation">;</span>
<span class="token keyword">Echo</span> <span class="token function">doubleval</span> <span class="token punctuation">（</span> <span class="token variable">$ c</span> <span class="token punctuation">）</span> <span class="token operator">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span></span>

自分で試してみてください