从url中提取参数名和参数值
在已知参数名的情况下,获取参数值,使用正则表达式能很容易做到。
网上Copy过来的方法,觉得挺好的,有js版本,php版本。
在已知参数名的情况下,获取参数值,使用正则表达式能很容易做到。js的实现方法如下:function getValue(url, name) {<br>
var reg = new RegExp('(\\?|&)' + name + '=([^&?]*)', 'i');<br>
var arr = url.match(reg);<br>
<br>
if (arr) {<br>
return arr[2];<br>
}<br>
<br>
return null;<br>
}
如果想获取所有的参数名和其对应的值,同样也可以使用正则表达式的方法,js实现方法:function getKeyValue(url) {<br>
var result = {};<br>
var reg = new RegExp('([\\?|&])(.+?)=([^&?]*)', 'ig');<br>
var arr = reg.exec(url);<br>
<br>
while (arr) {<br>
result[arr[2]] = arr[3];<br>
<br>
arr = reg.exec(url);<br>
}<br>
<br>
return result;<br>
}
注意在js中用于匹配的还有一个叫match,match是字符串的方法,而exec是RegExp对象的方法。使用字符串的match方法,同时正则表达式指定为全局匹配,那么正则表达式中的分组将没有用,返回的结果是所有匹配正则表达式的子字符串。exec方法没有使用全局匹配标志时,返回的时间第一个匹配的子字符,如果使用了全局匹配标志,第一次执行从头开始匹配符号的字符串,再次调用,就从上一次匹配结果后开始匹配。
下面提供php的实现方法:function getKeyValue($url) {<br>
$result = array();<br>
$mr = preg_match_all('/(\?|&)(.+?)=([^&?]*)/i', $url, $matchs);<br>
<br>
if ($mr !== FALSE) {<br>
for ($i = 0; $i
$result[$matchs[2][$i]] = $matchs[3][$i];<br>
}<br>
}<br>
<br>
return $result;<br>
}
php的preg_match_all方法把匹配的结果存放在第三个指定的参数中,是一个二维数组。第一维度是分组信息的数组,即第一个数组存放的是所有匹配的完整字符串,第二个数组存放的是第一个()对应的值得,第二维度是分组的值。
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