substr_replace

實例

例子1

把"Hello" 替換成"world"：

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Hello"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"world"</span> <span class="token punctuation">,</span> <span class="token number">0</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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例子2

從字符串的第6 個位置開始替換（把"world" 替換成"Shanghai"）：

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Hello world"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Shanghai"</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>

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例子3

從字符串結尾的第5 個位置開始替換（把"world" 替換成"Shanghai"）：

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Hello world"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Shanghai"</span> <span class="token punctuation">,</span> <span class="token operator">-</span> <span class="token number">5</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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例子4

在"world" 開頭插入"Hello"：

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"world"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"Hello "</span> <span class="token punctuation">,</span> <span class="token number">0</span> <span class="token punctuation">,</span> <span class="token number">0</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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例子5

一次性替換多個字符串。把每個字符串中的"AAA" 替換成"BBB"：

 <span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$replace</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"1: AAA"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"2: AAA"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"3: AAA"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">implode</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">,</span> <span class="token function">substr_replace</span> <span class="token punctuation">(</span> <span class="token variable">$replace</span> <span class="token punctuation">,</span> <span class="token string single-quoted-string">&#39;BBB&#39;</span> <span class="token punctuation">,</span> <span class="token number">3</span> <span class="token punctuation">,</span> <span class="token number">3</span> <span class="token punctuation">)</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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