How can I use php to check whether the email has been read?

How can I use php to check whether the email has been read?

When you send an email, you may want to know whether the email has been read by the recipient. The following code can meet this requirement. For more information, see

The Code is as follows:

<?

Error_reporting (0 );

Header ("Content-Type: image/jpeg ");

 

// Get IP

If (! Empty ($ _ SERVER ['HTTP _ CLIENT_IP '])

{

$ Ip = $ _ SERVER ['HTTP _ CLIENT_IP '];

}

Elseif (! Empty ($ _ SERVER ['HTTP _ X_FORWARDED_FOR '])

{

$ Ip = $ _ SERVER ['HTTP _ X_FORWARDED_FOR '];

}

Else

{

$ Ip = $ _ SERVER ['remote _ ADDR '];

}

 

// Time

$ Actual_time = time ();

$ Actual_day = date ('Y. m. D', $ actual_time );

$ Actual_day_chart = date ('d/m/Y', $ actual_time );

$ Actual_hour = date ('H: I: s', $ actual_time );

 

// GET Browser

$ Browser = $ _ SERVER ['HTTP _ USER_AGENT '];

 

// LOG

$ MyFile = "log.txt ";

$ Fh = fopen ($ myFile, 'a + ');

$ StringData = $ actual_day. ''. $ actual_hour.''. $ ip. ''. $ browser.''. "rn ";

Fwrite ($ fh, $ stringData );

Fclose ($ fh );

 

// Generate Image (Es. dimesion is 1x1)

$ Newimage = ImageCreate (1, 1 );

$ Grigio = ImageColorAllocate ($ newimage, 255,255,255 );

ImageJPEG ($ newimage );

ImageDestroy ($ newimage );

 

?>