PHP浼犲€煎拰浼犲紩鐢ㄣ€佷紶鍦板潃鐨勫尯鍒槸浠€涔堬紵_PHP鏁欑▼

PHP浼犲€煎拰浼犲紩鐢ㄣ€佷紶鍦板潃鐨勫尯鍒槸浠€涔堬紵_PHP鏁欑▼ | 甯涔嬪

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Lepaskan： 2016-07-13 17:46:36

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1432 orang telah melayarinya

浼犲€硷紝

鏄妸瀹炲弬鐨勫€艰祴鍊肩粰琛屽弬

閭ｄ箞瀵硅鍙傜殑淇敼锛屼笉浼氬奖鍝嶅疄鍙傜殑鍊?/p>

浼犲湴鍧€

鏄紶鍊肩殑涓€绉嶇壒娈婃柟寮忥紝鍙槸浠栦紶閫掔殑鏄湴鍧€锛屼笉鏄櫘閫氱殑濡俰nt

閭ｄ箞浼犲湴鍧€浠ュ悗锛屽疄鍙傚拰琛屽弬閮芥寚鍚戝悓涓€涓璞?/p>

浼犲紩鐢?/p>

鐪熸鐨勪互鍦板潃鐨勬柟寮忎紶閫掑弬鏁?/p>

浼犻€掍互鍚庯紝琛屽弬鍜屽疄鍙傞兘鏄悓涓€涓璞★紝鍙槸浠栦滑鍚嶅瓧涓嶅悓鑰屽凡

瀵硅鍙傜殑淇敼灏嗗奖鍝嶅疄鍙傜殑鍊?/p>

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瑙夊緱浠庡嚱鏁拌皟鐢ㄧ殑瑙掑害鐞嗚В姣旇緝濂?/p>

浼犲€硷細

鍑芥暟鍙傛暟鍘嬫爤鐨勬槸鍙傛暟鐨勫壇鏈€?/p>

浠讳綍鐨勪慨鏀规槸鍦ㄥ壇鏈笂浣滅敤锛屾病鏈変綔鐢ㄥ湪鍘熸潵鐨勫彉閲忎笂銆?/p>

浼犳寚閽堬細

鍘嬫爤鐨勬槸鎸囬拡鍙橀噺鐨勫壇鏈€?/p>

褰撲綘瀵规寚閽堣В鎸囬拡鎿嶄綔鏃讹紝鍏跺€兼槸鎸囧悜鍘熸潵鐨勯偅涓彉閲忥紝鎵€浠ュ鍘熸潵鍙橀噺鎿嶄綔銆?/p>

浼犲紩鐢細

鍘嬫爤鐨勬槸寮曠敤鐨勫壇鏈€傜敱浜庡紩鐢ㄦ槸鎸囧悜鏌愪釜鍙橀噺鐨勶紝瀵瑰紩鐢ㄧ殑鎿嶄綔鍏跺疄灏辨槸瀵逛粬鎸囧悜鐨勫彉閲忕殑鎿嶄綔銆傦紙浣滅敤鍜屼紶鎸囬拡涓€鏍凤紝鍙槸寮曠敤灏戜簡瑙ｆ寚閽堢殑鑽夌焊锛?nbsp;

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鍑芥暟鍙傛暟浼犻€掓満鍒剁殑鍩烘湰鐞嗚

銆€銆€鍑芥暟鍙傛暟浼犻€掓満鍒堕棶棰樺湪鏈川涓婃槸璋冪敤鍑芥暟锛堣繃绋嬶級鍜岃璋冪敤鍑芥暟锛堣繃绋嬶級鍦ㄨ皟鐢ㄥ彂鐢熸椂杩涜閫氫俊鐨勬柟娉曢棶棰樸€傚熀鏈殑鍙傛暟浼犻€掓満鍒舵湁涓ょ锛氬€间紶閫掑拰寮曠敤浼犻€掋€備互涓嬭璁虹О璋冪敤鍏朵粬鍑芥暟鐨勫嚱鏁颁负涓昏皟鍑芥暟锛岃璋冪敤鐨勫嚱鏁颁负琚皟鍑芥暟銆?/p>

銆€銆€鍊间紶閫掞紙passl-by-value锛夎繃绋嬩腑锛岃璋冨嚱鏁扮殑褰㈠紡鍙傛暟浣滀负琚皟鍑芥暟鐨勫眬閮ㄥ彉閲忓鐞嗭紝鍗冲湪鍫嗘爤涓紑杈熶簡鍐呭瓨绌洪棿浠ュ瓨鏀剧敱涓昏皟鍑芥暟鏀捐繘鏉ョ殑瀹炲弬鐨勫€硷紝浠庤€屾垚涓轰簡瀹炲弬鐨勪竴涓壇鏈€傚€间紶閫掔殑鐗圭偣鏄璋冨嚱鏁板褰㈠紡鍙傛暟鐨勪换浣曟搷浣滈兘鏄綔涓哄眬閮ㄥ彉閲忚繘琛岋紝涓嶄細褰卞搷涓昏皟鍑芥暟鐨勫疄鍙傚彉閲忕殑鍊笺€?/p>

銆€銆€寮曠敤浼犻€?pass-by-reference)杩囩▼涓紝琚皟鍑芥暟鐨勫舰寮忓弬鏁拌櫧鐒朵篃浣滀负灞€閮ㄥ彉閲忓湪鍫嗘爤涓紑杈熶簡鍐呭瓨绌洪棿锛屼絾鏄繖鏃跺瓨鏀剧殑鏄敱涓昏皟鍑芥暟鏀捐繘鏉ョ殑瀹炲弬鍙橀噺鐨勫湴鍧€銆傝璋冨嚱鏁板褰㈠弬鐨勪换浣曟搷浣滈兘琚鐞嗘垚闂存帴瀵诲潃锛屽嵆閫氳繃鍫嗘爤涓瓨鏀剧殑鍦板潃璁块棶涓昏皟鍑芥暟涓殑瀹炲弬鍙橀噺銆傛鍥犱负濡傛锛岃璋冨嚱鏁板褰㈠弬鍋氱殑浠讳綍鎿嶄綔閮藉奖鍝嶄簡涓昏皟鍑芥暟涓殑

瀹炲弬鍙橀噺銆?/p>

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浠呰璁轰竴涓嬪€间紶閫掑拰寮曠敤锛?/p>

鎵€璋撳€间紶閫掞紝灏辨槸璇翠粎灏嗗璞＄殑鍊间紶閫掔粰鐩爣瀵硅薄锛屽氨鐩稿綋浜巆opy锛涚郴缁熷皢涓虹洰鏍囧璞￠噸鏂板紑杈熶竴涓畬鍏ㄧ浉鍚岀殑鍐呭瓨绌洪棿銆?/p>

鎵€璋撳紩鐢紝灏辨槸璇村皢瀵硅薄鍦ㄥ唴瀛樹腑鐨勫湴鍧€浼犻€掔粰鐩爣瀵硅薄锛屽氨鐩稿綋浜庝娇鐩爣瀵硅薄鍜屽師濮嬪璞″搴斿悓涓€涓唴瀛樺瓨鍌ㄧ┖闂淬€傛鏃讹紝濡傛灉瀵圭洰鏍囧璞¤繘琛屼慨鏀癸紝鍐呭瓨涓殑鏁版嵁涔熶細鏀瑰彉銆?/p>

$a = 'c';

$b = &$a; //琛ㄧず$b 鍜?a 寮曠敤浜嗗悓涓€涓彉閲?/p>

$a = 'abc'; //杩欓噷閲嶇疆浜?a

echo $b; //灏嗚緭鍑篴bc

unset($a);//鍙栨秷寮曠敤

echo $b;//杩欓噷浠嶈緭鍑篴bc

$a = 'abcd';