is_scalar
変数がスカラーであるかどうかを検出します
日本語
日本語
変数がスカラーであるかどうかを確認します。
<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">"hello"</span> <span class="token punctuation">;</span> <span class="token keyword">エコー</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_scalar</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">'scalar'</span> <span class="token punctuation">：</span> <span class="token string single-quoted-string">'not scalar'</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">エコー</span><span class="token string double-quoted-string">「b is」</span> <span class="token operator">。</span> <span class="token punctuation">（</span> <span class="token function">is_scalar</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">'scalar'</span> <span class="token punctuation">：</span> <span class="token string single-quoted-string">'not scalar'</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">echo</span> <span class="token string double-quoted-string">"c is"</span> <span class="token operator">。</span> <span class="token punctuation">（</span> <span class="token function">is_scalar</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">'scalar'</span> <span class="token punctuation">：</span> <span class="token string single-quoted-string">'not scalar'</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 constant">null</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_scalar</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">'scalar'</span> <span class="token punctuation">：</span> <span class="token string single-quoted-string">'not scalar'</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 keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"green"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">）</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_scalar</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">'scalar'</span> <span class="token punctuation">：</span> <span class="token string single-quoted-string">'not scalar'</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>
floatval
serialize
var_dump
print_r
is_scalar
get_resource_type
is_numeric
doubleval
