The way you get %2520 is when. Since it's not mentioned anywhere in the. I am interested in knowing why '%20' is used as a space in urls, particularly why %20 was used and why we even need it in the first place.
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If you look at rfc 3986 appendix a, you will see that space is simply not mentioned anywhere in the grammar for defining a url. 分析如下： 根据 gb ∕ t 707―1998热轧槽钢国标，20号槽钢分为：20a；20b两种。 1、20a槽钢的标准：高：200㎜ 外宽：73㎜ 厚度：7.0㎜ 理论重量：22.637千克/米。 2、20b槽钢的标准：高：200㎜. What is the difference and why should this happen?
@metabyter i think it is more technically correct to phrase the question as in a url, should i encode the spaces using %20 or + in the query part of a url? because while the example you show.
A bit of explaining as to what that %2520 is : Sometimes the spaces get url encoded to the + sign, and some other times to %20. The % character is encoded as %25. As the aforementioned rfc does not include any reference of encoding spaces as +, i guess using %20 is the way to go today.
The common space character is encoded as %20 as you noted yourself.
