[PHP知识库]PHP入门7-2函数的应用(计算器)

<form action="" method="">
	<input type="text" name="no1" value="" />
	<select name="ysf">
		<option value="jia">+</option>
		<option value="jian">-</option>
		<option value="cheng">*</option>
		<option value="chu">/</option>
	</select>
	<input type="text" name="no2" value="" />
	<input type="submit"value="确认计算" />

</form>
<?php
	
	$no1 = $_GET['no1'];
	$no2 = $_GET['no2'];
	$ysf = $_GET['ysf'];

	function jsq($no1,$no2,$ysf){
		switch($ysf){
			case 'jia':
				echo $no1+$no2;
				break;
			case 'jian':
				echo $no1-$no2;
				break;
			case 'cheng':
				echo $no1*$no2;
				break;
			case 'chu':
				if($no2==0){
					echo'除数不能为0';
				}else{
					echo $no1/$no2;
				}
				break;
			default: 
				echo 请输入正确的运算符;
		}
		
	}
	jsq($no1,$no2,$ysf);
	

?>

效果

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