Php检查时间字符串整小时是否像“上午8:00”

Question

I have series of time strings like "8:00am", "8:15am", "8:30am" I also have timestamps for these times as keys of the arrays where as times are values so array would be like this:

Note: Timestamps are dummy in this example

array(
144441415=>"8:00am", 
1444784744=>8:30am
...
.....
);

I would like to know if hour is whole hour for example "8:00am", "9:00am" are whole hours but "8:45am" or "9:30am" are not whole hours. I would like to filter whole hours from array as mentioned above. Thanks.

Answer 1

Thank you Rudie I was able to get whole hour from number of seconds, thank you for your hint, so I did something like this:

//Loop through each hour of the day by getting both key and value
foreach( $hours_of_day $timestamp=>$time_string )
{
    //If timestamp mod by number of seconds in hours is zero this means whole hour
    if( ($timestamp%3600) == 0 )
    {
        echo "Whole hour = $timestring<br />";
    }
}