http_build_query

(PHP 5)

http_build_query?―?生成 URL-encode 之后的请求字符串

说明

string?http_build_query?(?array?$formdata?[,?string?$numeric_prefix?] )

使用给出的关联（或下标）数组生成一个经过 URL-encode 的请求字符串。参数?formdata?可以是数组或包含属性的对象。一个?formdata?数组可以是简单的一维结构，也可以是由数组组成的数组（其依次可以包含其它数组）。如果在基础数组中使用了数字下标同时给出了?numeric_prefix?参数，此参数值将会作为基础数组中的数字下标元素的前缀。这是为了让 PHP 或其它 CGI 程序在稍后对数据进行解码时获取合法的变量名。

Note:

用?arg_separator.output?来分隔参数。

Example #1?http_build_query()?使用示例

<?php $data?=?array('foo'=>'bar', ??????????????'baz'=>'boom', ??????????????'cow'=>'milk', ??????????????'php'=>'hypertext?processor'); ?????????????? echo?http_build_query($data);?//?foo=bar&baz=boom&cow=milk&php=hypertext+processor ?>

Example #2?http_build_query()?使用数字下标的元素

<?php $data?=?array('foo',?'bar',?'baz',?'boom',?'cow'?=>?'milk',?'php'?=>'hypertext?processor'); ?????????????? echo?http_build_query($data); ? echo?http_build_query($data,?'myvar_'); ?>

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简单的理解这两个函数

parse_str就是将一个url ?后面的参数转换成一个数组

array parse_str(url,arr)

parse_url是将一个完整的url解析成数组

array parse_url(string url)

http_build_query就是将一个数组转换成url ?后面的参数字符串，会自动进行urlencode处理

string http_build_query ( array formdata [, string numeric_prefix])

后面的给数组中没有指定键或者键为数字的加下标

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