Hello i m developing a project. In that user will signup and can add articles in different categories. What my client requirement is whenever someone submits article it should automatically checked for plagiarism and if it scores 80% on that than it should be published. Is there any opensource script...

Publishers and bloggers are affected by many problems. One of them: people who perform online plagiarism. Google has the power to give sanctions to your site if they see posts with duplicate content.

They can also do that when they encounter content of low quality via their Panda algorithm....