<!DOCTYPE html><html><head> <meta charset="utf-8"> <title></title> <script type="text/javascript"></script></head><body> <ul> </ul> <script type="text/javascript"> var xhr = new XMLHttpRequest(); xhr.open("GET","users.php?id=2"); xhr.send(); xhr.onreadystatechange=function(){ if(this.readyState==4){ console.log(this.responseText); } } </script></body></html>//PHP代码<?phpheader('Content-Type: application/json');$data = array( array( 'id' => 1, 'name' => '张三', 'age' => 18 ), array( 'id' => 2, 'name' => '李四', 'age' => 20 ), array( 'id' => 3, 'name' => '二傻子', 'age' => 18 ), array( 'id' => 4, 'name' => '三愣子', 'age' => 19 ));if (empty($_GET['id'])) { $json = json_encode($data); echo $json;} else{ foreach ($data as $item) { if ($item['id'] != $_GET['id']) continue; $json = json_encode($item); echo $json; }}
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