PHP ????
? ??????? ???? PHP? ????, ? ??? ??? ??? ???, ???? ?? ????? ???? ???.
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PHP ???
?? ?? ?? ??? :`intdiv ()`vs. ??? ??
intdiv () PerformStrueIntegerDivisionAndisaferforwholenumbers, whilecasting (int) AfterDivisionRiskSfloating-PointPrecisionErrors.2.bothtruncateTowardzero, ButcastingCanyieldIncorRectresultswithnegativeRimpreciseValuesDuetOfloat issentationIsss
Jul 27, 2025 am 12:19 AM
Demystifying PHP? ?? ??? : ???? ?? ?????
PHP ?? ??? ??? ???? ?? ??? ??? ??? ?? ?? ??? ?? ??? ?? (==) ? ?? ?? ???? ?????. 1. ??? ?? ?? ??? ??? ?? === ??; 2. ??? ??? (strict_types = 1) ?? ??? ??? ??????. 3. ??? ?? ??? ???? ??? ???? ?????. 4. ?? ???? ???? ??? ? ?? ??? ???? ???????. ??? ? ?? ?? ?? ??? PHP ??? ???? ?? ?? ?? ??? ???? ????? ?????.
Aug 01, 2025 am 07:44 AM
?, ?? ? ?? ???? ?? ??
nullbehavesinconsistlySTINTISTINTISTISTINTS : injavaScript, itbecomes0numerically and "null"asastring, whileinphp, itbecomes0asaninteger, anemptystringwhencasttostring, andfalseasaboolean —AlwaysCheckfornullexplyTlyBeforecasting.2.bleancastingcancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancancasting
Jul 30, 2025 am 05:37 AM
PHP 8 Strict ? Union ??? ???? ???? ??
CastingIsStillNecessaryInphp8despiteImProvedTypESafety, ?? ATINPUTBOUNDARIESHINGHTTPREQUESTSORAPISWHEREDATARIVESSASTRINGS.2.UNIONTYPESMAKECASTINGSAFERBYDEARLYDINGINGINGCEPTEBERCEPTEBERCEPTEBLENCECASTINGSOFINDINGINGCEPCEPTEBLENCEPTERSOPSINGINGINGECCEPTEBLENCEPTERPES
Jul 31, 2025 am 07:26 AM
PHP API? ??? ?? ???? ?? ???? ??
?? ??? ??? ???? ?? ?? ???? ??? ???? ?????. 2. ?? ???? ???? ?? PHP7.4? ?? ?? ? ?? ??? ??????. 3. ???? ??? ?? ??? ?? ???? ?? ??? ?????. 4. ?? ??? ?? ???? ?? ?? ??? ?????. 5. ??? ?? ??? ???? ?? JSON ??? ??????. 6. ? API?? ??? DTO ?? ???, ??? ? ??? ?? ?? ??? ???? ???? ?? ??? ???? API? ??? ??? ?????.
Jul 29, 2025 am 05:02 AM
?? ?? : Zend ??? ?? ??? ???? ??
thezendenginehandlesphp'sautomicaltictorevalues, typetags, and metadata? ???? thezendenginehandlessphp? convissions? variablestochangetypesdynamically; 1) uperations ??, itappliescontext ?? conversionrulessuchasturningstringstringstringswithleadingonumb
Jul 31, 2025 pm 12:44 PM
?? ?? :`(int)`vs.`intval ()`?`settype ()`
(int) isthefastestandnon-deastructive, tevelforsimpleconversionswitheoriginalvariable.2.intval ()? baseconversupportsandisslightlyslowsbutuseforparsingHexorbinaryStrings? ?????
Jul 30, 2025 am 03:48 AM
?? PHP ?? ?? ? ?? ??
deplare (strict_types = 1)? ???? ?? ?? ???? ?? ??? ??? ?? ?? ?? ? ?? ?? ??? ?? ??? ?????. 2. ??? ?? ??? ??? ??? ????? ????? ??? ?? ?? ??? ??? ??? ????? ????. 3. settype ()? ????? ?? ??? ?? ???? ?? ?? ??? ???? getType ()? ?? ??? ?? ? ?????. 4. ?? ???? ?? ??? ?? ??? ??? ?? ??-?? ?? ?? (? : toint)? ???? ???? ?? ??? ?? ??? ???????. 5. PHP8 Union ??? ?? ?? ?? ??? ???? ???? ??? ?? ??? ?? ??? ????????. 6. ??? ?? ??? STR? ???????
Jul 29, 2025 am 04:38 AM
?? ??? : PHP ?? ?????? ?? ??? ??
typecastinginphpcanimpactperperferferferformancessallyselynecessly, ?? expeenciveOperations likeObjectArrayConversions; 1. avoidEddantCasting, AsitAddScPuoverhead —E.G., castinganalkeinTegerValueinalOpinCreaseCutionB
Jul 30, 2025 am 04:26 AM
PHP? ?? ??? : ?? ???? ??? ?
?? ??? PHP? ?? ?? ??? ??? ????? ??? ?? ??? ? ????. 1. ?? ??? $ var = 42? ?? ??? ???? ?? ? ? ??? $ var = "hello"? ??? ? ????. 2. ?? ??? ???? ????? "hello"== 0? ?? ?? ? ???? ?? ??? ???? ????. 3. ???? ===, ?? ??, strict_types = 1; 4. ?? PHP? ???? ????? ?? ?? ??, ?? ?? ?? ? ??? ??? ?????. 5. ?? ??? ???? ??? ?? ??? ???? ?? ?? ???? ???? ????. ??? ?? ??? ??? ???? ???? ???????.
Jul 31, 2025 am 03:32 AMPHP ??
PHP? ?? ? ?? ? ?? ? ?? : ??? ? ???
?? ? ???? ?? ??? ???? Vertingavariabletoaspecifictypeuspeusingsyntax yntax? ?? (int) ?? (string), whilemplicitcoercioniSaticaticTomyTicOnverSionphpincontextSlikearitherconcatenation.1. ?? ? ??, ispredatasanitiz
Aug 01, 2025 am 07:44 AM
??? ?? ??????? PHP?? ?? ? ??? ??
ModularArithmeticEssentialInphPcryptographicapplicationsESpitepHpnotbeingahigh-performancelanguage; 2.itunderpinspublic-keysystemslikersaanddiffie-hellmanthrougherationssuchasmodularexponentiationandinvers;
Jul 30, 2025 am 12:17 AM
cryptocurrency ?? ?? : PHP?? BCMATH? ???? ??
bcmathissessentialforaccuratecryptocurrencyculationsinphpbecausefloating-pointarithmeticintructionceptaberoundingercations.1.Floating-pointnumbers like0.1 0.2yieldimprecessults (? : 0.3000000000000004)
Aug 01, 2025 am 07:48 AM
?? ???? ??? :`round ()`,`ceil ()`?`floor ()`??
Round ()? "Roundhalftoeven"? ???? "Roundhalfup"? ???? Soround (2.5) Returns2andround (3.5) returns4tominimizestatisticalbias, thatmaysurprisoSeExpectingTraditionArounding.2
Jul 29, 2025 am 04:55 AM
PHP? ??? ???? ??? ??? ??? ?????
php'strigonometricfunctionslikesin, cos, andtancanbeusedforscientificcalculationsinvolvinganglesandperiodicmotiondespitephpbeingprimally awebdevelopmentlanguage.2. theeseftionstectionsrequireanglesinradians, sodeg2radrad2degareSconitorUnitconconconconverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnverOnver
Jul 31, 2025 am 06:23 AM
PHP? ?? ?? ????? ?? ??
??? ??? ?? ??????. PHP??? ???? ?????. ??? IEEE754 ?? ??? ??? ???? ??? ??? ???? ??? ? ?? ????. 1.0.1 ?? 0.2? ?? ??? ??? ?? ?? ???? ???? ??? ???? ?? ??????. 2. ?? ??? ??? ??? ?? abs ($ a- $ b)? ?? == ?? ??? ???????.
Jul 29, 2025 am 05:01 AM
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