is_integer

예

변수가 정수 유형인지 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 number">32</span> <span class="token punctuation">;</span>
<span class="token keyword">에코</span> <span class="token string double-quoted-string">"a is"</span> <span class="token operator">.</span> <span class="token function">is_integer</span> <span class="token punctuation">(</span> <span class="token variable">$ a</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 variable">$ b</span> <span class="token operator">=</span> <span class="token number">0</span> <span class="token punctuation">;</span>
<span class="token keyword">에코</span> <span class="token string double-quoted-string">"B는"</span> <span class="token operator">.</span> <span class="token function">IS_INTEGER</span> <span class="token punctuation">(</span> <span class="token variable">$ B</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 variable">$ c</span> <span class="token operator">=</span> <span class="token number">32.5</span> <span class="token punctuation">;</span>
<span class="token keyword">에코</span> <span class="token string double-quoted-string">"C는"</span> <span class="token operator">.</span> <span class="token function">IS_INTEGER</span> <span class="token punctuation">(</span> <span class="token variable">$ C</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 variable">$ d</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"32"</span> <span class="token punctuation">;</span>
<span class="token keyword">Echo</span> <span class="token string double-quoted-string">"d is"</span> <span class="token operator">.</span> <span class="token function">is_integer</span> <span class="token punctuation">(</span> <span class="token variable">$ d</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 variable">$ e</span> <span class="token operator">=</span> <span class="token constant boolean">true</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"e is"</span> <span class="token operator">.</span> <span class="token function">IS_INTEGER</span> <span class="token punctuation">(</span> <span class="token variable">$ E</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 variable">$ f</span> <span class="token operator">=</span> <span class="token string double-quoted-string">"null"</span> <span class="token punctuation">;</span>
<span class="token keyword">Echo</span> <span class="token string double-quoted-string">"f is"</span> <span class="token operator">.</span> <span class="token function">is_integer</span> <span class="token punctuation">(</span> <span class="token variable">$ f</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 delimiter important">?></span></span>

직접 시도하십시오

예제 설명 :

PHP에서, 부울 값 true 또는 문자열 "32" 문자열에 숫자를 포함하더라도 정수 유형이 아닙니다. 따라서 $d 와 $e 확인하면 FALSE 반환합니다. 마찬가지로 $f 는 문자열이므로 콘텐츠가 "null" 이지만 정수 유형이 아니므로 수표는 FALSE 반환합니다. $c 와 같은 부동 소수점 번호는 분명히 정수가 아니므로 is_int($c) 도 FALSE 반환합니다.