I have an url which contains various POST-DATA in it And an image file at last. My example link is : http://website-link.com/?page=gf_signature&signature=565dbca63791e
You have a missing semicolon after:
$imgUrls = array(
'ptSignature' => 'http://website-link.com/?page=gf_signature&signature=5668695879dc84.35037895.png',
'pSignature' => 'http://website-link.com/?page=gf_signature&signature=5668694f80aa55.79055562.png',
'witness1Signature' => 'http://website-link.com/?page=gf_signature&signature=5668695875c6e5.03917128.png',
'witness2Signature' => 'http://website-link.com/?page=gf_signature&signature=5668695879dc84.35037895.png',
)
Putting a semicolon would fix the problem in question.