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PHP regular matching date and time (timestamp conversion) example code

May 02, 2018 am 10:26 AM
php date time

本文介绍下,用php实现正则匹配日期与时间,并进行时间戳转换的例子,有需要的朋友,参考下吧

先来一个比较简单实用的代码

日期YYYY-MM-DD

$str = '';
$isMatched = preg_match('/^\d{4}(\-|\/|.)\d{1,2}\1\d{1,2}$/', $str, $matches);
var_dump($isMatched, $matches);
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php需要一定的时间格式才能转换成时间戳(表示从格林威治时间1970年01月01日00时00分00秒起至现在的总秒数),这就要用到php正则判断,以下是代码:

<?php
//匹配时间格式为2016-02-16或2016-02-16 23:59:59前面为0时可以不写
$time = "2016-12-14 23:59:59";
$patten = "/^\d{4}[\-](0?[1-9]|1[012])[\-](0?[1-9]|[12][0-9]|3[01])(\s+(0?[0-9]|1[0-9]|2[0-3])\:(0?[0-9]|[1-5][0-9])\:(0?[0-9]|[1-5][0-9]))?$/";
if (preg_match($patten, $time)) {
 echo $timestro = strtotime($time);
} else {
 echo "error";
}
?>
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对该正则的分析:

/^\d{4}[\-](0?[1-9]|1[012])[\-](0?[1-9]|[12][0-9]|3[01])(\s+(0?[0-9]|[12][0-3])\:(0?[0-9]|[1-5][1-9])\:(0?[0-9]|[1-5][1-9]))?$/

/是表达式开始符 最后面的/是表达式的结束符
^字符串的开始,即以***开始
$表示字符串的结尾,即表示已***结尾
|表示或者
()表示一个单元
d{4}匹配一个4位数,
(\-)匹配一个“-”号,
(0?[1-9]|1[012])匹配月份,
(0?[1-9]|[12][0-9]|3[01])匹配天,
(\s+(0?[0-9]|1[0-9]|2[0-3])\:(0?[0-9]|[1-5][0-9])\:(0?[0-9]|[1-5][0-9]))?整个匹配时分秒部分,?表示有或者没有。
最后一步是对匹配成功的部分,进行时间戳转换。
当前转换结果为:1329407999

附上我自己写的实例,代码如下:

<meta charset=&#39;utf-8&#39;> 
<pre class="brush:php;toolbar:false"> 
<?php 
$str="嘿嘿2010/07/08 12:31:56哈哈1999/12/31 13:21:45"; 
$str2="嘿嘿2010-07-08 12:31:56哈哈1999-12-31 13:21:45"; 
//仅匹配日期 
preg_match_all("/d{4}/d{2}/d{2}/", $str, $arr); 
preg_match_all("/d{4}-d{2}-d{2}/", $str2, $arr2); 
//匹配日期与时间 
preg_match_all("/d{4}/d{2}/d{2}sd{2}:d{2}:d{2}/", $str, $arr3); 
preg_match_all("/d{4}-d{2}-d{2}sd{2}:d{2}:d{2}/", $str2, $arr4); 
echo &#39;<font color="red">匹配日期</font><br>&#39;; 
print_r($arr); 
print_r($arr2); 
echo &#39;<font color="red">匹配日期和时间</font><br>&#39;; 
print_r($arr3); 
print_r($arr4); 
?> 
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