Php universal detection function set (4)

// Function name: CheckExtendName ($ C_filename, $ A_extend) // Function: determine the extended name of the uploaded file // parameter: $ C_filename: Uploaded file name // $ A_extend request extended name // returned value: Boolean value // remarks: none // ----------------------- // Function name: CheckExtendName ($ C_filename, $ A_extend)
// For usage: determine the extended name of the uploaded file
// Parameter: $ C_filename: name of the uploaded file
// $ A_extend request extension name
// Return value: Boolean
// Standby Note: None
// Configure //-----------------------------------------------------------------------------------
-------
Function CheckExtendName ($ C_filename, $ A_extend)
{
If (strlen (trim ($ C_filename) <5)
{
Return 0; // returns 0, indicating that no image is uploaded.
}
$ Lastdot = strrpos ($ C_filename, '.'); // retrieves the final position.
$ Extended = substr ($ C_filename, $ lastdot 1); // Retrieve the extended name

For ($ I = 0; $ I {
If (trim (strtolower ($ extended) = trim (strtolower ($ A_extend [$ I]) // Large conversion
Lowercase and detection
{
$ Flag = 1; // The flag is successfully added.
$ I = count ($ A_extend); // if it is detected, the detection ends.
}
}

If ($ flag <> 1)
{
For ($ j = 0; $ j {
$ Alarm. = $ A_extend [$ j]. '';
}
AlertExit ('upload only '. $ alarm.' file! And you uploaded '. $ extended.' type File ');
Return-1; // return-1 indicates that the type of the uploaded image is inconsistent.
}

Return 1; // return 1 indicating that the image type meets the request
}
// Configure //-----------------------------------------------------------------------------------
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// Configure //-----------------------------------------------------------------------------------
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// Function name: CheckImageSize ($ ImageFileName, $ LimitSize)
// Usage: check the size of the uploaded image
// Parameter: name of the image uploaded by $ ImageFileName
// $ LimitSize requested size
// Return value: Boolean
// Standby Note: None
// Configure //-----------------------------------------------------------------------------------
-------
Function CheckImageSize ($ ImageFileName, $ LimitSize)
{
$ Size = GetImageSize ($ ImageFileName );
If ($ size [0]> $ LimitSize [0] │ $ size)
{
AlertExit ('large Image size ');
Return false;
}
Return true;
}
// Configure //-----------------------------------------------------------------------------------
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// Configure //-----------------------------------------------------------------------------------
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// Function name: Alert ($ C_alert, $ I _goback = 0)
// Usage: illegal control warning
// Parameter: $ C_alert (error message)
// $ I _goback (return to that page)
// Return value: string
// Standby Note: None
// Configure //-----------------------------------------------------------------------------------
-------
Function Alert ($ C_alert, $ I _goback = 0)
{
If ($ I _goback <> 0)
{
Echo 'script alert ('$ C_alert'); history. go ($ I _goback); script ';
}
Else
{
Echo 'script alert ('$ C_alert'); script ';
}
}
// Configure //-----------------------------------------------------------------------------------
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// Configure //-----------------------------------------------------------------------------------
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// Configure //-----------------------------------------------------------------------------------
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