is_string
변수가 문자열인지 여부를 감지하십시오
한국어
한국어
检查变量是否为字符串类型 ：
<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 string double-quoted-string">"안녕하세요"</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 punctuation">(</span> <span class="token function">is_string</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 single-quoted-string">'문자열'</span> <span class="token punctuation">:</span> <span class="token string single-quoted-string">'문자열이 아님'</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 punctuation">(</span> <span class="token function">is_string</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 single-quoted-string">'a string'</span> <span class="token punctuation">:</span> <span class="token string single-quoted-string">'string이 아님'</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</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 punctuation">(</span> <span class="token function">is_string</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 single-quoted-string">'문자열'</span> <span class="token punctuation">:</span> <span class="token string single-quoted-string">'문자열이 아님'</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 punctuation">(</span> <span class="token function">is_string</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 single-quoted-string">'문자열'</span> <span class="token punctuation">:</span> <span class="token string single-quoted-string">'문자열이 아님'</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 punctuation">(</span> <span class="token function">is_string</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 single-quoted-string">'문자열'</span> <span class="token punctuation">:</span> <span class="token string single-quoted-string">'문자열이 아님'</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 punctuation">(</span> <span class="token function">is_string</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 single-quoted-string">'문자열'</span> <span class="token punctuation">:</span> <span class="token string single-quoted-string">'문자열이 아님'</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">$ g</span> <span class="token operator">=</span> <span class="token string double-quoted-string">""</span> <span class="token punctuation">;</span> <span class="token keyword">에코</span> <span class="token string double-quoted-string">"g is"</span> <span class="token operator">.</span> <span class="token punctuation">(</span> <span class="token function">is_string</span> <span class="token punctuation">(</span> <span class="token variable">$ g</span> <span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token string single-quoted-string">'문자열'</span> <span class="token punctuation">:</span> <span class="token string single-quoted-string">'문자열이 아님'</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>
get_defined_vars
print_r
unset
is_null
is_callable
is_string
strval
serialize
