Url Chinese coding problem when how to use Curl to crawl remote content
This article introduces the knowledge of "how to use Curl to crawl remote content when url Chinese coding problem". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
For URL coding in PHP, you can use urlencode () or rawurlencode (). The difference is that the former encodes spaces as'+ 'and the latter encodes spaces as'% 20', but it should be noted that only part of the URL should be encoded, otherwise colons and backslashes in URL will also be escaped. The following is a detailed explanation:
The copy code is as follows:
String urlencode (string str)
Returns a string except-_. All non-alphanumeric characters outside are replaced with a percent sign (%) followed by two hexadecimal digits, and spaces are encoded with a plus sign (+).
Example 1: the difference between urlencode function and rawurlencode function
The copy code is as follows:
$str=' blog'
Echo urlencode ($str)
Echo "
"
Echo rawurlencode ($str)
Url results:
The copy code is as follows:
% B2%A9+%BF%CD
% B2%A9%20%BF%CD
Example 2: url Chinese coding method
From url: "http://www.baidu.com/s?wd= blog" to url: "http://www.baidu.com/s?wd=%E5%8D%9A%20%E5%AE%A2";
The copy code is as follows:
$url=' http://www.baidu.com/s?wd= blog'
$arr=explode ('=', $url)
$url=$arr [0].'= '.rawurlencode ($arr [1])
Echo $url
Results:
Http://www.baidu.com/s?wd=%E5%8D%9A%20%E5%AE%A2
Or use the following url encoding function
The copy code is as follows:
Function cn_urlencode ($url) {
$pregstr = "/ [\ x {4e00} -\ x {9fa5}] + / u"; / / UTF-8 Chinese regular
If (preg_match_all ($pregstr,$url,$matchArray)) {/ / matches Chinese and returns an array
Foreach ($matchArray [0] as $key= > $val) {
$url=str_replace ($val, urlencode ($val), $url); / / will be translated into Chinese
}
If (strpos ($url,'')) {/ / if there are spaces
$url=str_replace (',','% 20 minutes minute URL)
}
}
Return $url
}
Url results:
Http://www.baidu.com/s?wd=%E5%8D%9A%20%E5%AE%A2
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