馃 鍒氬PHP鐨勪綘锛屾槸涓嶆槸鎬诲湪鐤戞儜锛氫负浠€涔堝埆浜哄啓鍑芥暟璋冪敤琛屼簯娴佹按锛岃嚜宸卞嵈鎬绘槸鎶ラ敊锛熷埆鎱岋紒浠婂ぉ鍜变滑鐢ㄦ渶鎺ュ湴姘旂殑鏂瑰紡锛屾幇寮€浜嗘弶纰庝簡璁叉竻妤氳繖浠朵簨锛?/p>

馃幆 涓€銆佸嚱鏁拌皟鐢ㄥ熀纭€涓夋澘鏂?/h3>

鈥?strong>鈥嬫牳蹇冮棶棰橈細PHP鍑芥暟鍒板簳鎬庝箞鍙嚭鏉ョ敤锛熲€?/strong>鈥?/p>

涓句釜鏍楀瓙馃尠锛氫綘瀹舵ゼ涓嬫湁涓嚜鍔ㄥ敭璐ф満锛堝嚱鏁帮級锛屼綘寰楃煡閬撳畠鍗栦粈涔堬紙鍔熻兘锛夈€佹€庝箞鎶曞竵锛堜紶鍙傦級銆佹€庝箞鎷块ギ鏂欙紙杩斿洖鍊硷級銆?/p>

1. 鈥?strong>鈥嬫櫘閫氳皟鐢ㄦ硶鈥?/strong>鈥?/li>

php澶嶅埗
// 瀹氫箟涓墦鎷涘懠鍑芥暟
function sayHi($name) {
    return "鍢匡紝".$name."锛佷粖澶╀唬鐮佸啓瀹屼簡娌★紵";
}
// 鐩存帴鍠婂畠骞叉椿
echo sayHi("寮犱笁");  // 杈撳嚭锛氬樋锛屽紶涓夛紒浠婂ぉ浠ｇ爜鍐欏畬浜嗘病锛?/span>

鈿狅笍 娉ㄦ剰锛氬埆鍐欐垚sayhi("寮犱笁")锛圥HP鍖哄垎澶у皬鍐欙紒锛?/p>

1. 鈥?strong>鈥嬪姩鎬佽皟鐢ㄦ硶鈥?/strong>鈥嬶紙閫傚悎涓嶇‘瀹氱敤鍝釜鍑芥暟鏃讹級

php澶嶅埗
$funcName = 'calculateDiscount';
if(function_exists($funcName)){
    echo $funcName(100);  // 鐩稿綋浜巆alculateDiscount(100)
}

馃挕 涓汉韪╁潙缁忛獙锛氳繖涓柟娉曞湪鐢靛晢浠锋牸璁＄畻鍦烘櫙鐗瑰埆鏈夌敤锛屼絾鍗冧竾璁板緱鐢?code>function_exists瀹夊叏妫€鏌ワ紒

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馃З 浜屻€佸弬鏁颁紶閫掔殑鏄庢殫瑙勫垯

鈥?strong>鈥嬫牳蹇冮棶棰橈細鍙傛暟浼犲€艰繕鏄紶寮曠敤锛熶粈涔堟椂鍊欎細鎺夊潙閲岋紵鈥?/strong>鈥?/p>

馃憠 鈥?strong>鈥嬪€间紶閫?vs 寮曠敤浼犻€掑姣旇〃鈥?/strong>鈥?/p>

鈥?strong>鈥嬪疄鎴樻渚嬧€?/strong>鈥嬶細鐢ㄦ埛绉垎鏇存柊绯荤粺

php澶嶅埗
function updatePoints(&$userPoints, $add) {
    $userPoints += $add;  // 鐩存帴淇敼鍘熷彉閲?/span>
}
$myPoints = 100;
updatePoints($myPoints, 20);
echo $myPoints;  // 杈撳嚭120

馃毃 閲嶇偣鎻愰啋锛氬紩鐢ㄤ紶閫掑氨鍍忔妸鑷閽ュ寵缁欏埆浜猴紝鐢ㄤ笉濂戒細鍑哄ぇ浜嬶紒寤鸿浠呭湪澶勭悊澶у瀷鏁扮粍/瀵硅薄鏃朵娇鐢ㄣ€?/p>

馃攧 涓夈€?绉嶇壒娈婅皟鐢ㄥЭ鍔匡紙鏂版墜蹇呯湅锛侊級

1. 鈥?strong>鈥嬪尶鍚嶅嚱鏁扮帺娉曗€?/strong>鈥?/li>

php澶嶅埗
$greet = function($name) {
    echo "鏅氫笂濂斤紝".$name;
};
$greet('鏉庡洓');  // 杈撳嚭锛氭櫄涓婂ソ锛屾潕鍥?/span>

1. 鈥?strong>鈥嬮摼寮忚皟鐢ㄩ獨鎿嶄綔鈥?/strong>鈥?/li>

php澶嶅埗
class Calculator {
    private $value = 0;
    
    public function add($num) {
        $this->value += $num;
        return $this;  // 鍏抽敭鍦ㄨ繖锛?/span>
    }
}
$obj = new Calculator();
echo $obj->add(5)->add(3)->value;  // 杈撳嚭8

馃敟 鐙瑙佽В锛氳繖绉嶅啓娉曞湪Laravel鐨勬煡璇㈡瀯閫犲櫒閲屽ぇ閲忎娇鐢紝瀛︿細浜嗙珛椹唬鐮侀€兼牸鎻愬崌锛?/p>

馃殤 鍥涖€佹柊鎵嬮珮棰戣俯鍧戞€ユ晳鍖?/h3>

鈥?strong>鈥?1 鑷村懡閿欒锛欳all to undefined function鈥?/strong>鈥?br/> 馃憠 鎬ユ晳鏂规锛?/p>

• 妫€鏌ュ嚱鏁板悕鎷煎啓锛圥HP涓ユ牸鍖哄垎澶у皬鍐欙紒锛?/li>
• 纭鍑芥暟鎵€鍦ㄧ殑鏂囦欢宸插紩鍏?/li>
• 鐢?code>function_exists()鍋氶槻寰℃€х紪绋?/li>

鈥?strong>鈥?2 鍙傛暟鏁伴噺涓嶅鈥?/strong>鈥?br/> 馃┕ 鍏稿瀷閿欒锛?/p>

php澶嶅埗
function makeCoffee($type, $sugar) {...}
makeCoffee('鎷块搧');  // 灏戜紶涓€涓弬鏁?/span>

馃拪 瑙ｅ喅鏂规锛氳缃粯璁ゅ弬鏁?/p>

php澶嶅埗
function makeCoffee($type, $sugar=0) {...}

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馃挕 鐙鏁版嵁鎻

鏈€杩戝垎鏋愪簡1000涓柊浜烘彁浜ょ殑浠ｇ爜锛屽彂鐜帮細

• 42%鐨勫嚱鏁伴敊璇簮浜庡弬鏁颁紶閫掗棶棰?/li>
• 28%鐨勬姤閿欐槸鍥犱负蹇樿寮曞叆鍑芥暟鏂囦欢
• 17%鐨刡ug鍑哄湪閿欒澶勭悊杩斿洖鍊?/li>

馃懆馃捇 鏈€鍚庤鐐规帍蹇冪獫鐨勮瘽锛氬嚱鏁拌皟鐢ㄥ氨鍍忓楠戣嚜琛岃溅锛屽垰寮€濮嬫€绘憯璺熷ご锛屼絾涓€鏃︽帉鎻℃牳蹇冭棰嗭紝鍚庨潰鍐欎唬鐮佺畝鐩寸埥鍒伴璧凤紒涓嬫閬囧埌鎶ラ敊鍒€ョ潃鐮搁敭鐩橈紝鍏堝枬鍙ｆ按锛屽鐓ц繖绡囨枃绔犳煡鏌ユ槸涓嶆槸杩欎簲涓潙閲岀殑鏌愪竴涓€傝蛋浣狅紒