A simple PHP file upload sample program_PHP tutorial

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Release: 2016-07-13 17:15:22
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This article will introduce a simple PHP file upload sample program code to beginners. Friends who need to learn can enter it for reference.

The code is as follows
 代码如下 复制代码

// 定义提示函数

function alert($msg){

return '';

}


// 定义允许的文件类型

$allowType = array('image/jpeg','image/gif','image/jpg');


// 定义路径,可以是绝对路径,或者相对路径都可以

$filePath = './uploadFileDir/';

 

// 接收表单信息 其中里边写的 file 值是 静态页form表单里的name值

$file = $_FILES['file'];

 

// 第一步,判断上传的文件是否有错误

if( $file['error'] !== 0 ){

exit(alert('文件上传错误'));

}

 

// 第二步,判断文件大小,这里的102400是字节,换算为kb就是100kb

if( $file['size'] > 102400 ){

exit(alert('文件过大'));

}

 

// 第三步,判断文件类型

if( !in_array(mime_content_type($file['tmp_name']),$allowType) ){

exit(alert('文件类型错误'));

}

 

// 第四步,判断路径是否存在,如果不存在则创建

if( !file_exists($filePath) && !mkdir($filePath,0777,true) ){

exit(alert('创建目录错误'));

}

 

// 第五步,定义上传后的名字及路径

$filename = time().'_'.$file['name'];

 

// 第六步,复制文件

if( !copy($file['tmp_name'],$filePath.$filename) ){

exit(alert('上传文件出错,请稍候重试'));

}

 

// 第七步,删除临时文件

unlink($file['tmp_name']);

 

// 提示上传成功

echo alert('恭喜,上传文件['.$filename.']成功!');
?>

Copy code

//Define prompt function

return ''; }
// Define allowed file types
$allowType = array('image/jpeg','image/gif','image/jpg');
// Define the path, which can be an absolute path or a relative path
$filePath = './uploadFileDir/';
//Receive form information. The file value written inside is the name value in the static page form $file = $_FILES['file']; // The first step is to determine whether the uploaded file has errors if( $file['error'] !== 0 ){ exit(alert('File upload error')); } // The second step is to determine the file size. 102400 here is bytes, converted to kb it is 100kb if( $file['size'] > 102400 ){ exit(alert('File too large')); } //The third step is to determine the file type if( !in_array(mime_content_type($file['tmp_name']),$allowType) ){ exit(alert('File type error')); } // The fourth step is to determine whether the path exists. If it does not exist, create it if( !file_exists($filePath) && !mkdir($filePath,0777,true) ){ exit(alert('Error creating directory')); } //The fifth step, define the name and path after uploading $filename = time().'_'.$file['name']; // Step 6, copy the file if( !copy($file['tmp_name'],$filePath.$filename) ){ exit(alert('Error uploading file, please try again later')); } // Step 7, delete temporary files unlink($file['tmp_name']); // Prompt upload successful echo alert('Congratulations, uploading file ['.$filename.'] was successful!');
?> http://www.bkjia.com/PHPjc/628866.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/628866.htmlTechArticleThis article will introduce a simple PHP file upload sample program code to beginners. Friends who need to learn References can be entered. The code is as follows Copy code ?php // Definition prompt...
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