is_callable
檢測參數是否為合法的可調用結構
中文(繁體)
中文(繁體)
檢查變量的內容是否可以作為函數調用：
<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">function</span> <span class="token function-definition function">test1</span> <span class="token punctuation">(</span> <span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token punctuation">}</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"test1 is callable: "</span> <span class="token operator">.</span> <span class="token function">is_callable</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"test1"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"<br>"</span> <span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token string double-quoted-string">"test2 is callable: "</span> <span class="token operator">.</span> <span class="token function">is_callable</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"test2"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>
is_long
is_resource
get_resource_type
is_callable
is_real
is_int
is_integer
is_countable
