join

实例

例子 1

把数组元素组合为一个字符串：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$arr</span> <span class="token operator">=</span> <span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string single-quoted-string">'Hello'</span><span class="token punctuation">,</span><span class="token string single-quoted-string">'World!'</span><span class="token punctuation">,</span><span class="token string single-quoted-string">'I'</span><span class="token punctuation">,</span><span class="token string single-quoted-string">'love'</span><span class="token punctuation">,</span><span class="token string single-quoted-string">'Shanghai!'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">join</span><span class="token punctuation">(</span><span class="token string double-quoted-string">" "</span><span class="token punctuation">,</span><span class="token variable">$arr</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

用不同的字符分隔数组元素：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$arr</span> <span class="token operator">=</span> <span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string single-quoted-string">'Hello'</span><span class="token punctuation">,</span><span class="token string single-quoted-string">'World!'</span><span class="token punctuation">,</span><span class="token string single-quoted-string">'I'</span><span class="token punctuation">,</span><span class="token string single-quoted-string">'love'</span><span class="token punctuation">,</span><span class="token string single-quoted-string">'Shanghai!'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">join</span><span class="token punctuation">(</span><span class="token string double-quoted-string">" "</span><span class="token punctuation">,</span><span class="token variable">$arr</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">echo</span> <span class="token function">join</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"+"</span><span class="token punctuation">,</span><span class="token variable">$arr</span><span class="token punctuation">)</span><span class="token operator">.</span><span class="token string double-quoted-string">"<br>"</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">join</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"-"</span><span class="token punctuation">,</span><span class="token variable">$arr</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">echo</span> <span class="token function">join</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"X"</span><span class="token punctuation">,</span><span class="token variable">$arr</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

亲自试一试