Hello,
I'm very experienced in captcha solvers. Have worked in more than 20 similar jobs for different clients all around the world. I use my own made OCR library developed in c# .NET, instead of tesseract, because the character segmentation used to be extremely difficult in captcha recognition, as must be in tesseract. As you need to use the solver in php, it's possible to create a C# .NET/Mono console application that receives a path to a captcha image and return the decoded text to the standard output. This could be called from php using exec().
Could you share some captcha images to evaluate the complexity of the job?
Best Regards,
Allan
(Solvoj LLC)