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// Obtain the image format, including jpg, png, and gif.
Function get_type ($ img_name) // Obtain the image file type
{
If (preg_match ("/. (jpg | jpeg | gif | png | bmp) $/I", $ img_name, $ matches )){
$ Type = strtolower ($ matches [1]);
} Else {
$ Type = "string ";
}
Return $ type;
}
// Determine the Upload file type
$ Allowedextensions = array ("txt", "csv", "htm", "html", "xml ",
"Css tutorial", "doc", "xls", "rtf", "ppt", "pdf", "swf", "flv", "avi ",
"Wmv", "mov", "jpg", "jpeg", "gif", "png ");
Foreach ($ _ files as $ file ){
If ($ file ['tmp _ name']> ''){
If (! In_array (end (explode (".",
Strtolower ($ file ['name']),
$ Allowedextensions )){
Die ($ file ['name']. 'is an invalid file type! <Br/> '.
'<A href = "webpage effect: history. go (-1);"> '.
'& Lt; & lt go back </a> ');
}
}
}
// Optional file and image types
Function checktitle ($ filename ){
$ File = fopen ($ filename, "rb ");
$ Bin = fread ($ file, 2); // read-only 2 bytes
Fclose ($ file );
$ Strinfo = @ unpack ("c2chars", $ bin );
$ Typecode = intval ($ strinfo ['chars1']. $ strinfo ['chars2']);
$ Filetype = "";
Switch ($ typecode)
{
Case 7790:
$ Filetype = 'exe ';
Break;
Case 7784:
$ Filetype = 'midi ';
Break;
Case 8297:
$ Filetype = 'rar ';
Break;
Case 255216:
$ Filetype = 'jpg ';
Break;
Case 7173:
$ Filetype = 'GIF ';
Break;
Case 6677:
$ Filetype = 'bmp ';
Break;
Case 13780:
$ Filetype = 'PNG ';
Break;
Default:
$ Filetype = 'unknown '. $ typecode;
}
// Fix
If ($ strinfo ['chars1'] = '-1' & $ strinfo ['chars2'] ='-40 '){
Return 'jpg ';
}
If ($ strinfo ['chars1'] = '-119' & $ strinfo ['chars2'] = '80 '){
Return 'PNG ';
}
Return $ filetype;
}
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