技术问答PHP function_exists()鍑芥暟濡備綍浣跨敤 - 扬州沐宇科技

鍑芥暟function_exists()鐢ㄤ簬妫€鏌ユ寚瀹氱殑鍑芥暟鏄惁瀛樺湪銆傚畠鍙互鎺ュ彈涓€涓嚱鏁板悕浣滀负鍙傛暟锛屽苟杩斿洖涓€涓竷灏斿€硷紝琛ㄧず璇ュ嚱鏁版槸鍚﹀瓨鍦ㄣ€?/p>

浣跨敤function_exists()鍑芥暟鐨勮娉曞涓嬶細

bool function_exists ( string $function_name )

鍙傛暟$function_name鏄妫€鏌ョ殑鍑芥暟鐨勫悕绉般€傚畠鍙互鏄竴涓瓧绗︿覆锛屼篃鍙互鏄竴涓寘鍚嚱鏁板悕绉扮殑鍙橀噺銆?/p>

涓嬮潰鏄竴涓娇鐢╢unction_exists()鍑芥暟鐨勪緥瀛愶細

if (function_exists('myFunction')) {
echo "myFunction 瀛樺湪";
} else {
echo "myFunction 涓嶅瓨鍦?quot;;
}

鍦ㄤ笂闈㈢殑渚嬪瓙涓紝function_exists()鍑芥暟棣栧厛妫€鏌ュ悕涓?quot;myFunction"鐨勫嚱鏁版槸鍚﹀瓨鍦ㄣ€傚鏋滃瓨鍦紝瀹冧細杈撳嚭"myFunction 瀛樺湪"锛涘鏋滀笉瀛樺湪锛屽畠浼氳緭鍑?quot;myFunction 涓嶅瓨鍦?quot;銆?/p>