Web Front-endJS TutorialAnalyzing jsonp cross-domain access from both front-end and back-end perspectivesAnalyzing jsonp cross-domain access from both front-end and back-end perspectives
Extensions to verify legality in php5. In PHP5.2, legality can be verified through the built-in extension filter.
1. What is cross-domain access
For example: In website A, we hope to use Ajax to obtain specific content in website B. If website A and website B are not in the same domain, then there will be a cross-domain access problem. You can understand that two domain names cannot send requests or request data across domain names, otherwise it will be unsafe. Cross-domain access violates the same origin policy. For detailed information on the same origin policy, you can click on the following link: Same-origin_policy;
In short, the same origin policy stipulates that the browser's ajax can only access the same HTML page as its Source (same domain name or IP) resources. 2. What is JSONPJSONP (JSON with Padding) is a "usage mode" of JSON that can be used to solve the problem of cross-domain data access by mainstream browsers.Due to the same-origin policy, generally speaking, web pages located at server1.example.com cannot communicate with servers other than server1.example.com, and HTML's
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