正则表达式 数字
小弟求大神给一则正则表达式和另一个正则表达式或检验方法,具体情况为:1.有一个这样的输入,要求用户输入的是当天的时间,格式为:9:08,14:23,00:54 这样的格式。请注意小时数可以为一位也可以为两位。
这样的情况下,正则表达式该如何写呢?以及如何用这个正则表达式判断呢?(小弟早就知道正则表达式的厉害,但没有用过,请大神们别见怪)
2.另外一个输入的是,要求用户输入的是钱的数额,格式为:13.04 ;5000; 123.6....。总之,输入的数字可以为小数,也可以为整数;而小数点后可以是一位,也可以是两位,但必须限制在两位以内。一句话,就想判断用户在这里输入的是数字或者带小数点的float,因为后面我要把这些数字来相加的。
我想,是不是有一个神奇的正则表达式可以直接检测?或者马虎点,就直接判断该输入为一个数字就行呢?
求大神给个神奇的正则表达式或者给一个检验方法。
本贴100分,不够我另外赠送分数。
回复讨论(解决方案)
先写个测试钱数额的
//$money = '123';//$money = '12.3';//$money = '123.4';$money = '123.45';//$money = '123.456';//$money = '123456';if( preg_match('/^\d+(\.\d{1,2})?$/',$money) ){ echo $money;}
如果严格测试的话,测试时间的这个用正则来写的话,其实倒是麻烦了不少。
倒不是小时一位两位的问题,而是想36这样的超过合法范围的小时数并不容易检测出来。
if( preg_match('/([0-9]|0[0-9]|1[0-9]|2[0-3]):[0-5][0-9]/',$time) ){
echo $time;
}
大神,先谢过。我马上来测试。
测试成功,谢过,结贴。
如果严格测试的话,测试时间的这个用正则来写的话,其实倒是麻烦了不少。
倒不是小时一位两位的问题,而是想36这样的超过合法范围的小时数并不容易检测出来。
if( preg_match('/([0-9]|0[0-9]|1[0-9]|2[0-3]):[0-5][0-9]/',$time) ){
echo $time;
}
谢过,送分。

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