PHP unset鍏ㄥ眬鍙橀噺杩愮敤闂璇﹁В_PHP鏁欑▼ | 甯涔嬪

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<ol class="dp-xml">
<li class="alt"><span class="tag"> ?PHP  </span></li>
<li><span>function destroy_foo() {  </span></li>
<li class="alt"><span>global $foo;  </span></li>
<li><span>unset($foo);  </span></li>
<li class="alt"><span>}  </span></li>
<li>
<span>$</span><span class="attribute">foo</span><span> = ‘bar’;  </span>
</li>
<li class="alt"><span>destroy_foo();  </span></li>
<li><span>echo $foo;  </span></li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
</ol>

杩斿洖鐨勭粨鏋滀负

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<ol class="dp-xml">
<li class="alt"><span class="tag"> ?PHP  </span></li>
<li><span>function foo() {  </span></li>
<li class="alt"><span>unset($GLOBALS['bar']);  </span></li>
<li><span>}  </span></li>
<li class="alt">
<span>$</span><span class="attribute">bar</span><span> = “something”;  </span>
</li>
<li><span>foo();  </span></li>
<li class="alt"><span>var_dump($bar);  </span></li>
<li>
<span class="tag">?></span><span> </span>
</li>
</ol>

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