array_intersect
计算数组的交集
简体中文
简体中文
比较两个数组的键值，并返回交集：
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token variable">$a1</span><span class="token operator">=</span><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"a"</span><span class="token operator">=></span><span class="token string double-quoted-string">"red"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"b"</span><span class="token operator">=></span><span class="token string double-quoted-string">"green"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"c"</span><span class="token operator">=></span><span class="token string double-quoted-string">"blue"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"d"</span><span class="token operator">=></span><span class="token string double-quoted-string">"yellow"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token variable">$a2</span><span class="token operator">=</span><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"e"</span><span class="token operator">=></span><span class="token string double-quoted-string">"red"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"f"</span><span class="token operator">=></span><span class="token string double-quoted-string">"green"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"g"</span><span class="token operator">=></span><span class="token string double-quoted-string">"blue"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token variable">$result</span><span class="token operator">=</span><span class="token function"></span><mark><span class="token function">array_intersect</span><span class="token punctuation">(</span><span class="token variable">$a1</span><span class="token punctuation">,</span><span class="token variable">$a2</span><span class="token punctuation">)</span></mark><span class="token punctuation"></span><span class="token punctuation">;</span> <span class="token function">print_r</span><span class="token punctuation">(</span><span class="token variable">$result</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token delimiter important">?></span></span>
比较三个数组的键值，并返回交集：
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token variable">$a1</span><span class="token operator">=</span><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"a"</span><span class="token operator">=></span><span class="token string double-quoted-string">"red"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"b"</span><span class="token operator">=></span><span class="token string double-quoted-string">"green"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"c"</span><span class="token operator">=></span><span class="token string double-quoted-string">"blue"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"d"</span><span class="token operator">=></span><span class="token string double-quoted-string">"yellow"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token variable">$a2</span><span class="token operator">=</span><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"e"</span><span class="token operator">=></span><span class="token string double-quoted-string">"red"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"f"</span><span class="token operator">=></span><span class="token string double-quoted-string">"black"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"g"</span><span class="token operator">=></span><span class="token string double-quoted-string">"purple"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token variable">$a3</span><span class="token operator">=</span><span class="token keyword">array</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"a"</span><span class="token operator">=></span><span class="token string double-quoted-string">"red"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"b"</span><span class="token operator">=></span><span class="token string double-quoted-string">"black"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"h"</span><span class="token operator">=></span><span class="token string double-quoted-string">"yellow"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token variable">$result</span><span class="token operator">=</span><span class="token function"></span><mark><span class="token function">array_intersect</span><span class="token punctuation">(</span><span class="token variable">$a1</span><span class="token punctuation">,</span><span class="token variable">$a2</span><span class="token punctuation">,</span><span class="token variable">$a3</span><span class="token punctuation">)</span></mark><span class="token punctuation"></span><span class="token punctuation">;</span> <span class="token function">print_r</span><span class="token punctuation">(</span><span class="token variable">$result</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token delimiter important">?></span></span>
array_is_list
krsort
array_merge_recursive
array_unshift
array_search
arsort
array_udiff_uassoc
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