//表单://s.php//要在选择上传文件时能一次选择多个文件,那么就加multiple="multiple" ,还有注意下name="myFile1"和name="myFile[]"的区别,单文件、多文件上传.<meta charset="utf-8"><title>无标题文档</title>//上传函数的封装://ss.php$val){ $files[$i]['name']=$file['name'][$key]; $files[$i]['type']=$file['type'][$key]; $files[$i]['tmp_name']=$file['tmp_name'][$key]; $files[$i]['error']=$file['error'][$key]; $files[$i]['size']=$file['size'][$key]; $i++; } } } return $files;}//针对于单文件、多个单文件、多文件的上传//默认允许上传的文件只为图片类型,并且只有这些图片类型:$allowExt=array('jpeg','jpg','png','gif');并且检查上传的文件是否为真实的图片$flag=true//默认上传保存的文件夹为本地的'uploads'文件夹,允许上传文件的大小最大为2Mfunction uploadFile($fileInfo,$path='./uploads',$flag=true,$allowExt=array('jpeg','jpg','png','gif'),$maxSize=2097152){ //判断错误号 if($fileInfo['error']===UPLOAD_ERR_OK){ //检测上传文件的大小 if($fileInfo['size']>$maxSize){ $res['mes']=$fileInfo['name'].'上传文件过大'; } $ext=getExt($fileInfo['name']); //检测上传文件的文件类型 if(!in_array($ext,$allowExt)){ $res['mes']=$fileInfo['name'].'非法文件类型'; } //检测是否是真实的图片类型 if($flag){ if(!getimagesize($fileInfo['tmp_name'])){ $res['mes']=$fileInfo['name'].'不是真实图片类型'; } } //检测文件是否是通过HTTP POST上传上来的 if(!is_uploaded_file($fileInfo['tmp_name'])){ $res['mes']=$fileInfo['name'].'文件不是通过HTTP POST方式上传上来的'; } if( $res ) return $res; //如果要不显示错误信息的话,用if( @$res ) return $res; //$path='./uploads'; //如果没有这个文件夹,那么就创建一 if(!file_exists($path)){ mkdir($path,0777,true); chmod($path,0777); } //新文件名唯一 $uniName=getUniName(); $destination=$path.'/'.$uniName.'.'.$ext; //@符号是为了不让客户看到错误信,也可以删除 if(!@move_uploaded_file($fileInfo['tmp_name'],$destination)){ $res['mes']=$fileInfo['name'].'文件移动失败'; } $res['mes']=$fileInfo['name'].'上传成功'; $res['dest']=$destination; return $res; }else{ //匹配错误信息 //注意!错误信息没有5 switch($fileInfo['error']){ case 1: $res['mes'] = '上传文件超过了PHP配置文件中upload_max_filesize选项的值'; break; case 2: $res['mes'] = '超过了HTML表单MAX_FILE_SIZE限制的大小'; break; case 3: $res['mes'] = '文件部分被上传'; break; case 4: $res['mes'] = '没有选择上传文件'; break; case 6: $res['mes'] = '没有找到临时目录'; break; case 7: $res['mes'] = '文件写入失败'; break; case 8: $res['mes'] = '上传的文件被PHP扩展程序中断'; break; } return $res; }}?>//common.ss.php//上传后文件的操作:'; $uploadFiles[]=$res['dest'];//如果要不显示错误信息的话,用@$uploadFiles[]=$res['dest'];}$uploadFiles=array_values(array_filter($uploadFiles));//这样便于保存到数据库print_r($uploadFiles);//打印查看上传保存的结果?>

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl

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

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

Dependency injection (DI) significantly improves the testability of PHP code by explicitly transitive dependencies. 1) DI decoupling classes and specific implementations make testing and maintenance more flexible. 2) Among the three types, the constructor injects explicit expression dependencies to keep the state consistent. 3) Use DI containers to manage complex dependencies to improve code quality and development efficiency.

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


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