array_key_exists

예

예 1

키 이름 "Volvo"가 배열에 존재하는지 확인하십시오.

 <span class="token php language-php"><span class="token delimiter important"><? php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">배열</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Volvo"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"xc90"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"bmw"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"x5"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token keyword">만약에</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">Array_key_exists</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Volvo"</span> <span class="token punctuation">,</span> <span class="token variable">$ a</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">))</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">에코</span> <span class="token string double-quoted-string">"열쇠가 존재합니다!"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">또 다른</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">에코</span> <span class="token string double-quoted-string">"키가 존재하지 않습니다!"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token delimiter important">?></span>

직접 시도하십시오

예 2

키 이름 "Toyota"가 배열에 존재하는지 확인하십시오.

 <span class="token php language-php"><span class="token delimiter important"><? php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">배열</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Volvo"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"xc90"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"bmw"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"x5"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token keyword">만약에</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">key_exists</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Toyota"</span> <span class="token punctuation">,</span> <span class="token variable">$ a</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">))</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">에코</span> <span class="token string double-quoted-string">"열쇠가 존재합니다!"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">또 다른</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">에코</span> <span class="token string double-quoted-string">"키가 존재하지 않습니다!"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token delimiter important">?></span>

직접 시도하십시오

예 3

정수 키 이름 "0"이 배열에 존재하는지 확인하십시오.

 <span class="token php language-php"><span class="token delimiter important"><? php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Volvo"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"bmw"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token keyword">만약에</span> <span class="token punctuation">(</span><span class="token function"></span></span><mark> <span class="token function">array_key_exists</span> <span class="token punctuation">(</span> <span class="token number">0</span> <span class="token punctuation">,</span> <span class="token variable">$ a</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">))</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">에코</span> <span class="token string double-quoted-string">"열쇠가 존재합니다!"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">또 다른</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">에코</span> <span class="token string double-quoted-string">"키가 존재하지 않습니다!"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token delimiter important">?></span>

직접 시도하십시오