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<?phpprint_r($_REQUEST);if(!empty($_POST)){if($_POST['opt'] == '+'){$num = (int)$_POST['x'] + (int)$_POST['y'];}else if($_POST['opt'] == '-'){$num = (int)$_POST['x'] - (int)$_POST['y'];}else if($_POST['opt'] == '*'){$num = (int)$_POST['x'] * (int)$_POST['y'];}else if($_POST['opt'] == '/'){$num = (int)$_POST['x'] / (int)$_POST['y'];}else if($_POST['opt'] == '%'){$num = (int)$_POST['x'] % (int)$_POST['y'];}echo 'x'. $_POST['opt'] . 'y 计算结果：' .$num;}else if($_POST['opt'] == '%'){$num = (int)$_POST['x'] % (int)$_POST['y'];}?><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title></head><body><h1>计算器</h1><form action="" method="post"><input type="number" name="x" value="<?=isset($_POST['x'])?$_POST['x']:''; ?>" /><select name="opt"><option value="+" <?=isset($_POST['opt']) && $_POST['opt']=='+'?'selected':'' ?>>+</option><option value="-" <?=isset($_POST['opt']) && $_POST['opt']=='-'?'selected':'' ?>>-</option><option value="*" <?=isset($_POST['opt']) && $_POST['opt']=='*'?'selected':'' ?>>*</option><option value="/" <?=isset($_POST['opt']) && $_POST['opt']=='/'?'selected':'' ?>>/</option><option value="%" <?=isset($_POST['opt']) && $_POST['opt']=='%'?'selected':'' ?>>%</option></select><input type="number" name="y" value="<?=isset($_POST['y'])?$_POST['y']:''; ?>" /><input type="submit" value="计算" /></form></body></html>
<?phpfunction get_url($url,$data,$is_post=0){$ch = curl_init();curl_setopt($ch, CURLOPT_URL ,'http://apis.juhe.cn/simpleWeather/query?key=abc4b64ae7656b460723402175a5650b&city=合肥');if($is_post == 0){if(!empty($data)){$url .= '?';foreach($data as $k=>$v){$url .= $k . '=' . $v . '&';}}}curl_setopt($ch, CURLOPT_URL ,$url);curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3);curl_setopt($ch, CURLOPT_TIMEOUT, 30);curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);curl_setopt($ch, CURLOPT_AUTOREFERER, 1);curl_setopt($ch, CURLOPT_HEADER, 0);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_USERAGENT, 'Data');curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);if($is_post == 1){curl_setopt($ch, CURLOPT_POST, 1);curl_setopt($ch, CURLOPT_POSTFIELDS , $data);}$html = curl_exec($ch);if(curl_errno($ch)){return curl_errno($ch);}curl_close($ch);return $html;}$data = ['key' => 'abc4b64ae7656b460723402175a5650b','city' => '合肥'];echo get_url('http://apis.juhe.cn/simpleWeather/query',$data);?>
