rtrim
刪除字符串末端的空白字符（或者其他字符）
中文(繁體)
中文(繁體)
從字符串右側移除字符：
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Hello World!"</span> <span class="token punctuation">;</span> <span class="token keyword">echo</span> <span class="token variable">$str</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span> <span class="token keyword">echo</span> <span class="token function">rtrim</span> <span class="token punctuation">(</span> <span class="token variable">$str</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"World!"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span> <span class="token delimiter important">?></span></span>
移除字符串右側的空格：
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Hello World! "</span> <span class="token punctuation">;</span> <span class="token keyword">echo</span> <span class="token string double-quoted-string">"不使用rtrim："</span> <span class="token operator">.</span> <span class="token variable">$str</span> <span class="token punctuation">;</span> <span class="token keyword">echo</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span> <span class="token keyword">echo</span> <span class="token string double-quoted-string">"使用rtrim："</span> <span class="token operator">.</span> <span class="token function">rtrim</span> <span class="token punctuation">(</span> <span class="token variable">$str</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span> <span class="token delimiter important">?></span></span>
以上代碼的HTML 輸出如下（查看源代碼）：
<span class="token operator"><</span> <span class="token operator">!</span> <span class="token constant">DOCTYPE</span> html <span class="token operator">></span> <span class="token operator"><</span> html <span class="token operator">></span> <span class="token operator"><</span> body <span class="token operator">></span> 不使用rtrim：Hello World <span class="token operator">!</span> <span class="token operator"><</span> br <span class="token operator">></span>使用rtrim：Hello World <span class="token operator">!</span> <span class="token operator"><</span> <span class="token operator">/</span> body <span class="token operator">></span> <span class="token operator"><</span> <span class="token operator">/</span> html <span class="token operator">></span>
以上代碼的瀏覽器輸出：
不使用rtrim：Hello World! 使用rtrim：Hello World!
移除字符串右側的換行符（\n）：
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Hello World!\n\n\n"</span> <span class="token punctuation">;</span> <span class="token keyword">echo</span> <span class="token string double-quoted-string">"不使用rtrim："</span> <span class="token operator">.</span> <span class="token variable">$str</span> <span class="token punctuation">;</span> <span class="token keyword">echo</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span> <span class="token keyword">echo</span> <span class="token string double-quoted-string">"使用rtrim："</span> <span class="token operator">.</span> <span class="token function">rtrim</span> <span class="token punctuation">(</span> <span class="token variable">$str</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span> <span class="token delimiter important">?></span></span>
以上代碼的HTML 輸出如下（查看源代碼）：
<span class="token operator"><</span> <span class="token operator">!</span> <span class="token constant">DOCTYPE</span> html <span class="token operator">></span> <span class="token operator"><</span> html <span class="token operator">></span> <span class="token operator"><</span> body <span class="token operator">></span> 不使用rtrim：Hello World <span class="token operator">!</span> <span class="token operator"><</span> br <span class="token operator">></span>使用rtrim：Hello World <span class="token operator">!</span> <span class="token operator"><</span> <span class="token operator">/</span> body <span class="token operator">></span> <span class="token operator"><</span> <span class="token operator">/</span> html <span class="token operator">></span>
以上代碼的瀏覽器輸出：
不使用rtrim：Hello World! 使用rtrim：Hello World!
