


PHP character encoding problem: GB2312 VS UTF-8 solution_PHP tutorial
Look at the code:
$string1 = "i am a phper";
$string2 = "This website is a home for scripts";
print_r(str_split($string1));
echo "
";
print_r(str_split( $string2,4));
?>
The test results came out as I expected——Chinese Garbled characters
Why? Why? Why? Why? What is garbled code? What is garbled code? Explain to me, what is the garbled code of %&!
Because there are no garbled characters in English but only Chinese garbled characters, I first thought about the encoding problem, and then suddenly remembered that the encoding of UTF-8 is that UTF-8 requires 3 bytes. Let’s treat it like a dead horse!
So print_r(str_split($string2,4)); the 4 in this sentence was replaced by 6, so - look at the result
Similarly, you can also try changing the UTF-8 of the encoded charset to GB2312. Because Unicode encoding requires 2 bytes, Gb2312 encoding can save 1/3 of the space than UTF-8. But if you want to be compatible with other languages such as Traditional Chinese, Korean, and Japanese, you need to use UTF-8.

TomakePHPapplicationsfaster,followthesesteps:1)UseOpcodeCachinglikeOPcachetostoreprecompiledscriptbytecode.2)MinimizeDatabaseQueriesbyusingquerycachingandefficientindexing.3)LeveragePHP7 Featuresforbettercodeefficiency.4)ImplementCachingStrategiessuc

ToimprovePHPapplicationspeed,followthesesteps:1)EnableopcodecachingwithAPCutoreducescriptexecutiontime.2)ImplementdatabasequerycachingusingPDOtominimizedatabasehits.3)UseHTTP/2tomultiplexrequestsandreduceconnectionoverhead.4)Limitsessionusagebyclosin

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DatabasequeryoptimizationinPHPinvolvesseveralstrategiestoenhanceperformance.1)Selectonlynecessarycolumnstoreducedatatransfer.2)Useindexingtospeedupdataretrieval.3)Implementquerycachingtostoreresultsoffrequentqueries.4)Utilizepreparedstatementsforeffi

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PHP performance bottlenecks can be solved through the following steps: 1) Use Xdebug or Blackfire for performance analysis to find out the problem; 2) Optimize database queries and use caches, such as APCu; 3) Use efficient functions such as array_filter to optimize array operations; 4) Configure OPcache for bytecode cache; 5) Optimize the front-end, such as reducing HTTP requests and optimizing pictures; 6) Continuously monitor and optimize performance. Through these methods, the performance of PHP applications can be significantly improved.

DependencyInjection(DI)inPHPisadesignpatternthatmanagesandreducesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itallowspassingdependencieslikedatabaseconnectionstoclassesasparameters,facilitatingeasiertestingandscalability.

CachingimprovesPHPperformancebystoringresultsofcomputationsorqueriesforquickretrieval,reducingserverloadandenhancingresponsetimes.Effectivestrategiesinclude:1)Opcodecaching,whichstorescompiledPHPscriptsinmemorytoskipcompilation;2)DatacachingusingMemc


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