substr

名前:substr

カテゴリ:弦

対応言語:php

一言説明:文字列の一部を返します。

例

例1

文字列から「世界」を返す：

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">、</span> <span class="token number">6</span> <span class="token punctuation">）</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

例2

異なる正と負の数の開始パラメーターを使用します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">、</span> <span class="token number">10</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 keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">、</span> <span class="token number">1</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 keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">、</span> <span class="token number">3</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 keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">、</span> <span class="token number">7</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 keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">、</span> <span class="token operator">-</span> <span class="token number">1</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 keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">、</span> <span class="token operator">-</span> <span class="token number">10</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 keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">、</span> <span class="token operator">-</span> <span class="token number">8</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 keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token string double-quoted-string">"Hello World"</span> <span class="token punctuation">、</span> <span class="token operator">-</span> <span class="token number">4</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

例3

異なる正と負の数を持つ開始パラメーターと長さのパラメーターを使用します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token punctuation">"</span> Hello <span class="token operator">World</span> <span class="token string double-quoted-string">"</span> <span class="token punctuation">、</span> <span class="token number">0、10</span> <span class="token number">）</span> <span class="token punctuation">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token punctuation">"</span> <span class="token string double-quoted-string">Hello World</span> <span class="token operator">"</span> <span class="token punctuation">、</span> <span class="token number">1、8</span> <span class="token number">）</span> <span class="token punctuation">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token punctuation">"</span> Hello <span class="token operator">World</span> <span class="token string double-quoted-string">"</span> <span class="token punctuation">、</span> <span class="token number">0、5</span> <span class="token number">）</span> <span class="token punctuation">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token keyword">エコー</span><span class="token function">サブストール</span><span class="token punctuation">（</span> <span class="token punctuation">"</span> <span class="token string double-quoted-string">Hello World</span> <span class="token operator">"</span> <span class="token punctuation">、</span> <span class="token number">6、6</span> <span class="token number">）</span> <span class="token punctuation">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>

<span class="token keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token operator">"</span> <span class="token string double-quoted-string">Hello World"</span> <span class="token punctuation">、</span> <span class="token number">0</span> <span class="token punctuation">、</span> <span class="token operator">-1</span> <span class="token punctuation">）</span> <span class="token number">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token punctuation">"</span> <span class="token string double-quoted-string">Hello World"</span> <span class="token punctuation">、</span> <span class="token operator">-</span> <span class="token number">10</span> <span class="token punctuation">、</span> <span class="token operator">-2</span> <span class="token number">）</span> <span class="token operator">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token punctuation">"</span> <span class="token string double-quoted-string">Hello World"</span> <span class="token punctuation">、</span> <span class="token number">0</span> <span class="token punctuation">、</span> <span class="token operator">-6</span> <span class="token number">）</span> <span class="token operator">。</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token keyword">エコー</span><span class="token function">サブスト</span><span class="token punctuation">（</span> <span class="token punctuation">"</span> <span class="token string double-quoted-string">Hello World</span> <span class="token operator">"</span> <span class="token punctuation">、</span> <span class="token operator">-</span> <span class="token number">2-3</span> <span class="token operator">）</span> <span class="token number">。</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