The following code snippet takes a date in ISO format (YYYY-MM-DD) and prints it in DD.MM.YYYY format: 例子 1. ereg() example<?php if (ereg ("([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})", $date, $regs)) { echo "$regs[3].$regs[2].$regs[1]"; } else { echo "Invalid date format: $date"; } ?>
{
.......
}
if(!ereg("^[0-9]+$",$str)//如果不是数字
{
.......
}
echo "错误";
}else{
echo "正确";
}
if (ereg ("([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})", $date, $regs)) {
echo "$regs[3].$regs[2].$regs[1]";
} else {
echo "Invalid date format: $date";
}
?>
if(this.value/1!=this.value) {alert('输入的不是合法数字!'); return false;}