Post textarea text information to the patron, but the background can not be extracted to the image array, solve?

Post textarea text information to the background, but the background can not be extracted to the image array, solve????
I used Kindeditor to do a textarea online edit box, when the user deleted textarea inside the picture upload another picture, in order to save server space. I extracted the textarea image from the original database to form an array, and then compare each value in the array with the newly passed TextArea In_array (), and the saved picture is deleted. Strange, the new passed over the textarea, but unable to extract the image array, extract the result is an empty array. Please enlighten me, thank you. Post Extract Pictures http

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Need to know how you extracted it.
Also need to know the contents of $_post[' textarea ')

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