(There are many consultations for PHPRSA encryption and decryption on the Internet. Many black people copy the code at will, and can't manage the problems of people who need it. Some only need the RSA.PHP file, and some add multi-point encryption methods without decryption. , Here are the detailed methods used for encryption and decryption to share. There are two methods here, one is JAVASCRIPT encryption, PHP decryption; one is HP self-encryption and self-decryption)