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php变量作用域+条件语句-2018年8月23日
兔子的博客
Original
764 people have browsed it

数据类型判断检测

实例

<?php
	$a='123';
	$b=123;
	$c=12.3;
	$d=true;
	$age=[10,12,13,14,15,16,17,18];
	$num = count($age); //数组内元素数量
	echo gettype($a).'<br>';//变量检测
	echo gettype($b).'<br>';
	echo gettype($c).'<br>';
	echo gettype($d).'<br>';
	echo settype($c,'integer');
	echo gettype($c).'<br>';//设置变量
	//判断数字大小分类
	//注意判断条件
	for($i=0;$i<$num;$i++){
		//echo $age[$i];
		if($age[$i]<13){
			echo $age[$i].'<br>';
		}else if (13<=$age[$i]&&$age[$i]<17) {
			echo $age[$i].'<br>';
		}else if($age[$i]>=17){
			echo $age[$i].'<br>';
		}
	}
?>

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Correction status:qualified

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