For some reasons, sometime it's not working. You can do like this instead:
unlink('ssh2.sftp://' . intval($sftp) . ssh2_sftp_realpath($sftp,".") . "./".$dstFile);
For some reasons, sometime it's not working. You can do like this instead:
unlink('ssh2.sftp://' . intval($sftp) . ssh2_sftp_realpath($sftp,".") . "./".$dstFile);