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Home >Backend Development >PHP Tutorial >PHP unset鍏ㄥ眬鍙橀噺杩愮椤邂璇﹁В_PHP鏁欑▼ | 宁涔嫔

PHP unset鍏ㄥ眬鍙橀噺杩愮椤邂璇﹁В_PHP鏁欑▼ | 宁涔嫔

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2016-07-15 13:34:211228browse

PHP 涓湁涓喷鏀怕彉彉忕殑璇彞鍙仛unset锛堜粠PHP4Liaoset "簬鏄妸unset闂鍐粨沨濡备笅銆傚鏋沧偍浠旂粏闃呰杩嘝HP鐨勬坠鍐岋紝閭榅箞箰箞篬鏂囩珷浜嗭紝杩欑瘒鏂囩珷鏄启缁欑湅鎵嫔唽涓敤蹇幂殑鍚屽鐨勩€?/p>

<ol class="dp-xml"><li class="alt">
<span class="tag"><</span> ?PHP  </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> = &lsquo;bar&rsquo;;  </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

涓轰粈涔堜细杩欐牱鍛紵鍘熷洜皓辨槸PHP unset鍏ㄥ眬鍙橀噺鍦ㄥ嚱鏁授予腑鍙兘閿€姣佸眜? The 

<ol class="dp-xml"><li class="alt">
<span class="tag"><</span> ?PHP  </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> = &ldquo;something&rdquo;;  </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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http: //www.bkjia.com/PHPjc/445986.htmlTechArticlePHP 涓湁涓喷鏀恐惧彉忕殑璇彞鍙仛4unset锜寮€濮媢nset宸茬粡涓嶅啀鏄竴涓嚱鏁颁簡锛岃€屾槸涓€涓鍙ワ級锛屽墠鍑犲ぉ鐢╱nset鐨勬椂鍊欏嚭浜嗙偣闂锛屼簬鏄妸unset闂?..
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