html code
html lang=<span>"en"</span>> head> meta charset=<span>"UTF-8"</span>> meta name=<span>"Generator" </span>content=<span>"EditPlus?"</span>> meta name=<span>"Author" </span>content=<span>""</span>> meta name=<span>"Keywords" </span>content=<span>""</span>> meta name=<span>"Description" </span>content=<span>""</span>> title>Document<span>title</span>> <span>head</span>> body> center> br>br>br> br>br>br> form method=<span>"post" </span>action=<span>"a.php" </span>enctype=<span>"multipart/form-data"</span>> input type=<span>"button" </span>value=<span>"下载" </span>onclick=<span>"</span><span>download</span>()<span>"</span>> input type=<span>'button' </span>value=<span>"加一个" </span>onclick=<span>"</span><span>jia</span>()<span>"</span>>br>br id=<span>"j"</span>> 上传:input type=<span>"file" </span>name=<span>'file' </span>id=<span>'file'</span>>br>br> input type=<span>'submit' </span>value=<span>"OK"</span>> <span>form</span>> <span>center</span>> <span>body</span>> script src=<span>"./jq.js"</span>><span>script</span>> script> <span>var </span><span>i</span><span>=</span><span>1</span>; <span>function </span><span>jia</span>(){ $(<span>"#j"</span>).after(<span>'上传:<input type="file" name="file'</span><span>+</span><span>i</span><span>+</span><span>'" id="file'</span><span>+</span><span>i</span><span>+</span><span>'"><br><br>'</span>); <span>i</span><span>++</span>; } <span>function </span><span>download</span>(){ <span>location</span>.<span>href</span><span>=</span><span>'b.php'</span>; } <span>script</span>> <span>html</span>>
php code upload
<span><?php </span><span>header(</span><span>"Content-type:text/html;charset=utf-8"</span><span>);</span><span>//设置编码 </span><span>$dsn=</span><span>"mysql:dbname=book;host=localhost"</span><span>; </span><span>$db=new </span><span>PDO(</span><span>$dsn</span><span>,</span><span>'root'</span><span>,</span><span>'root'</span><span>,</span><span>array</span><span>(PDO</span><span>::</span><span>MYSQL_ATTR_INIT_COMMAND</span><span>=></span><span>'SET NAMES </span><span>\'</span><span>UTF8</span><span>\'</span><span>'</span><span>));</span><span>//连接数据库,设置传递数据库的数据为utf8的编码格式 </span><span>//引入excel类 </span><span>include </span><span>'./PHPExcel.php'</span><span>; </span><span>//引用类文件 </span><span>include </span><span>'./PHPExcel/IOFactory.php'</span><span>;</span><span>//引用相应的类文件 </span><span> /*echo $_FILES["file"]["name"] . "<br>"; </span><span> echo $_FILES["file"]["type"] . "<br>"; </span><span> echo ($_FILES["file"]["size"] / 1024) . " Kb<br>"; </span><span> echo $_FILES["file"]["tmp_name"]. "<br>";*/ </span><span></span><span>foreach</span><span>(</span><span>$_FILES as $key </span><span>=> </span><span>$val</span><span>){ </span><span></span><span>$str = </span><span>substr(</span><span>$val</span><span>[</span><span>'name'</span><span>],strrpos(</span><span>$val</span><span>[</span><span>'name'</span><span>],</span><span>'.'</span><span>)</span><span>+</span><span>1</span><span>); </span><span></span><span>if </span><span>(</span><span>$val</span><span>[</span><span>"error"</span><span>] </span><span>> </span><span>0</span><span>) </span><span> { </span><span></span><span>echo $val</span><span>[</span><span>'name'</span><span>]</span><span>.</span><span>"上传发生错误"</span><span>. </span><span>"<br>"</span><span>; </span><span></span><span>continue</span><span>; </span><span> } </span><span></span><span>if</span><span>(</span><span>$str != </span><span>'xls'</span><span>){ </span><span></span><span>echo </span><span>'必须是xls文件'</span><span>. </span><span>"<br>"</span><span>; </span><span></span><span>continue</span><span>; </span><span> } </span><span></span><span>if </span><span>(file_exists(iconv(</span><span>"UTF-8"</span><span>,</span><span>"GB2312"</span><span>,</span><span>'./xls/'</span><span>.$val</span><span>[</span><span>"name"</span><span>]))) </span><span> { </span><span></span><span>echo $val</span><span>[</span><span>'name'</span><span>] </span><span>. </span><span>"已存在"</span><span>. </span><span>"<br>"</span><span>; </span><span></span><span>continue</span><span>; </span><span> } </span><span></span><span>else </span><span></span><span>{ </span><span> move_uploaded_file(</span><span>$val</span><span>[</span><span>"tmp_name"</span><span>],iconv(</span><span>"UTF-8"</span><span>,</span><span>"GB2312"</span><span>,</span><span>'./xls/'</span><span>.$val</span><span>[</span><span>"name"</span><span>])); </span><span></span><span>echo $val</span><span>[</span><span>"name"</span><span>],</span><span>'以上传成功!'</span><span>; </span><span> } </span><span></span><span>$xlsPath = </span><span>iconv(</span><span>"UTF-8"</span><span>,</span><span>"GB2312"</span><span>,</span><span>'./xls/'</span><span>.$val</span><span>[</span><span>"name"</span><span>]); </span><span>//指定要读取的exls路径 </span><span> //$type = 'Excel2007'; //设置要解析的Excel类型 Excel5(2003或以下版本)或Excel2007 </span><span></span><span>$type = </span><span>'Excel5'</span><span>; </span><span></span><span>$xlsReader = </span><span>PHPExcel_IOFactory</span><span>::</span><span>createReader(</span><span>$type</span><span>); </span><span></span><span>$Sheets = $xlsReader-></span><span>load(</span><span>$xlsPath</span><span>); </span><span></span><span>//开始读取 </span><span></span><span>$Sheet = $Sheets-></span><span>getSheet(</span><span>0</span><span>)</span><span>-></span><span>toArray(); </span><span>//读取第一个工作表(注意编号从0开始) 如果读取多个可以做一个循环0,1,2,3.... </span><span></span><span> //得到二维数组,每个小数组是excel表格内容的一行 里面包含此行的每列的数据 </span><span></span><span>echo </span><span>'<pre class="brush:php;toolbar:false">'; //print_r($Sheet);die; foreach($Sheet as $k=>$v){ $res=$db->exec("INSERT INTO a (data) values('".$v[1]."')");//写入数据库 if($res){ //print_r($Sheet); //执行成功后,输出数据 } } } ?>
php code download
<span><?php </span><span>header(</span><span>"Content-type:text/html;charset=utf-8"</span><span>);</span><span>//设置编码 </span><span>function </span><span>exportExcel(</span><span>$filename</span><span>,</span><span>$content</span><span>){ </span><span> header(</span><span>"Cache-Control: must-revalidate, post-check=0, pre-check=0"</span><span>); </span><span> header(</span><span>"Content-Type: application/vnd.ms-execl"</span><span>); </span><span> header(</span><span>"Content-Type: application/force-download"</span><span>); </span><span> header(</span><span>"Content-Type: application/download"</span><span>); </span><span> header(</span><span>"Content-Disposition: attachment; filename="</span><span>.$filename</span><span>); </span><span> header(</span><span>"Content-Transfer-Encoding: binary"</span><span>); </span><span> header(</span><span>"Pragma: no-cache"</span><span>); </span><span> header(</span><span>"Expires: 0"</span><span>); </span><span></span><span>echo $content</span><span>; </span><span></span><span>} </span><span></span><span></span><span>$dsn=</span><span>"mysql:dbname=book;host=localhost"</span><span>; </span><span>$db=new </span><span>PDO(</span><span>$dsn</span><span>,</span><span>'root'</span><span>,</span><span>'root'</span><span>,</span><span>array</span><span>(PDO</span><span>::</span><span>MYSQL_ATTR_INIT_COMMAND</span><span>=></span><span>'SET NAMES </span><span>\'</span><span>UTF8</span><span>\'</span><span>'</span><span>));</span><span>//实例化pdo对象 </span><span>$res=$db-></span><span>query(</span><span>"select * from a"</span><span>);</span><span>//从数据库查询数据 </span><span>$str = </span><span>"id</span><span>\t</span><span>数据</span><span>\t\n</span><span>"</span><span>; </span><span>$str = </span><span>iconv(</span><span>'utf-8'</span><span>,</span><span>'gb2312'</span><span>,</span><span>$str</span><span>);</span><span>//iconv() 是编码转换函数 </span><span>$row=$res-></span><span>fetchAll(); </span><span>foreach</span><span>(</span><span>$row as $key </span><span>=> </span><span>$val</span><span>){ </span><span></span><span>$id = </span><span>iconv(</span><span>'utf-8'</span><span>,</span><span>'gb2312'</span><span>,</span><span>$val</span><span>[</span><span>'id'</span><span>]); </span><span></span><span>$data = </span><span>iconv(</span><span>'utf-8'</span><span>,</span><span>'gb2312'</span><span>,</span><span>$val</span><span>[</span><span>'data'</span><span>]); </span><span></span><span>$str .= $id.</span><span>"</span><span>\t</span><span>"</span><span>.$data.</span><span>"</span><span>\t\n</span><span>"</span><span>; </span><span>} </span><span>$filename = </span><span>date(</span><span>'Ymd'</span><span>)</span><span>.</span><span>'.xls'</span><span>; </span><span>exportExcel(</span><span>$filename</span><span>,</span><span>$str</span><span>); </span><span>//生成excel表格</span></span>
The above introduces excel uploading and downloading, including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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