Does javascript-js or php have A function to determine A url? If the address of 404 hops is not 404, directly request the url.

Js or php does not have A function to determine A url. If the request is 404, skip the address and directly request the url if it is not 404. The requested url is the android client schema: myapp ..... This is urlgeo: 39.901149, 116.41851? Z14 indicates whether there is A function in .. js or php to judge A url. If the request is 404, skip A url if it is not 404 and directly request the url.

The requested url is in the form of schema: myapp on the android client .....

This is url geo: 39.901149, 116.41851? Z = 14
This means that if googlemap is installed on the client, the googlemaps application will be opened. If the application is not installed, the request for geo: 39.901149, 116.41851 will be sent directly? Z = 14

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Js or php does not have A function to determine A url. If the request is 404, skip the address and directly request the url if it is not 404.

The requested url is in the form of schema: myapp on the android client .....

This is url geo: 39.901149, 116.41851? Z = 14
This means that if googlemap is installed on the client, the googlemaps application will be opened. If the application is not installed, the request for geo: 39.901149, 116.41851 will be sent directly? Z = 14

If you want to solve your website problems, you can directly jump to the page, where do you think so many websites have a uniform 404 page ....

If you want to capture the URLs of other websites, you can also obtain the http return status code and determine whether it is 404.