htmlentities

实例

例子 1

把字符转换为 HTML 实体：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"<? W3S?h????>"</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$str</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

以上代码的 HTML 输出如下（查看源代码）：

<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>
<span class="token operator"><</span>? <span class="token constant">W3S</span>?h°°|§<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>

以上代码的浏览器输出：

<span class="token php language-php"><span class="token delimiter important"><?</span> <span class="token constant">W3S</span><span class="token operator">?</span>h<span class="token operator">??</span><span class="token operator">?</span><span class="token delimiter important">?></span></span>

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例子 2

把字符转换为 HTML 实体：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"Bill & 'Steve'"</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$str</span><span class="token punctuation">,</span> <span class="token constant">ENT_COMPAT</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 只转换双引号</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 function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$str</span><span class="token punctuation">,</span> <span class="token constant">ENT_QUOTES</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 转换双引号和单引号</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"<br>"</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$str</span><span class="token punctuation">,</span> <span class="token constant">ENT_NOQUOTES</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 不转换任何引号</span>
<span class="token delimiter important">?></span></span>

以上代码的 HTML 输出如下（查看源代码）：

<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>
Bill <span class="token operator">&</span> <span class="token string single-quoted-string">'Steve'</span><span class="token operator"><</span>br<span class="token operator">></span>
Bill <span class="token operator">&</span> <span class="token operator">&</span><span class="token comment">#039;Tarzan&#039;<br></span>
Bill <span class="token operator">&</span> <span class="token string single-quoted-string">'Steve'</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>

以上代码的浏览器输出：

Bill & 'Steve'
Bill & 'Steve'
Bill & 'Steve'

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例子 3

通过使用西欧字符集，把一些字符转换为 HTML 实体：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$str</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"My name is ?yvind ?sane. I'm Norwegian."</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">htmlentities</span><span class="token punctuation">(</span><span class="token variable">$str</span><span class="token punctuation">,</span> <span class="token constant">ENT_QUOTES</span><span class="token punctuation">,</span> <span class="token string double-quoted-string">"ISO-8859-1"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> 
<span class="token comment">// Will only convert double quotes (not single quotes), and uses the character-set Western European</span>
<span class="token delimiter important">?></span></span>

以上代码的 HTML 输出如下（查看源代码）：

<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>
My name is ?yvind ?sane<span class="token operator">.</span> <span class="token constant">I</span>'m Norwegian<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>

以上代码的浏览器输出：

My name is ?yvind ?sane. I'm Norwegian.

亲自试一试