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mysql datetime + mktime();

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  #1  
Old June 30th, 2003, 01:00 PM
Taelo Taelo is offline
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mysql datetime + mktime();
ok,....I am using a datetime field in mysql so that I can do date comparisons via sql syntax.

however, when I try to pass that mysql field to date(); I get.

Wed, December 31, 1969 @ 7 pm


so,....I pass my mysql field into mktime()

PHP Code:
 $date = mktime( mysql_row['datetime_field'] ); 


then my date displays correctly.



now the question...lol
I like storing my dates as datetime fields so I can compare via sql, but this extra step through mktime(); is killing me. is there another way to do this?
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  #2  
Old June 30th, 2003, 01:13 PM
neoxean neoxean is offline
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Not that I know of. Is this really such a big deal? You write the code once in a function and you never have to look at it again.
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Old June 30th, 2003, 03:10 PM
Taelo Taelo is offline
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well for large queries it can be,.... I mean,...I am doing 1 comparison in sql, then have to pass it through mktime();,....so,...yes and no i guess,....just looking for options is all
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Old June 30th, 2003, 03:47 PM
laidbak laidbak is offline
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You will find that for many reasons you will have to convert your date. I won't go into detail right now as the subject can get quite complex, but just know that this is the case.

Its really not that intese to run a function over your date field, and there really isn't a "better" way to do it IMHO; however, if you want you to can use the database function: UNIX_TIMESTAMP().

This is a mysql function, so do expect that it is portable to another DB Engine. Its possible, but not likely. Just make sure you test across ports before use.
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Last edited by laidbak : June 30th, 2003 at 03:50 PM.
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  #5  
Old June 30th, 2003, 04:39 PM
Taelo Taelo is offline
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gotcha,....ohh and I got that date time select class working great now. POST info stays saved in the form in case of errors as well
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Old June 30th, 2003, 05:18 PM
laidbak laidbak is offline
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Cool... post an example.
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Old June 30th, 2003, 11:25 PM
Taelo Taelo is offline
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there is not much different then the previous, there are a few changes though. an if else statement is in there in case the form has been posted. just posting 1 of the functions here.

PHP Code:
class dateSelect
{
    function sMonth( $sMonth, $cssid, $name )
    {
        echo "<select class=\"$cssid\" name=\"$name\">";
        if( $sMonth )
        {
            for( $i = 1; $i < 13; $i++ )
            {
                if( $i == $sMonth )
                {
                    echo "<option value=\"$i\" selected=\"selected\">";
                }
                else
                {
                    echo "<option value=\"$i\">";
                }
                echo date( "F", mktime( 0,0,0,$i,1,date( "Y" ) ) ) . "\n";
            }
        }
        else
        {
            for( $i = 1; $i < 13; $i++ )
            {
                if( $i == date( "n" ) )
                {
                    echo "<option value=\"$i\" selected=\"selected\">";
                }
                else
                {
                    echo "<option value=\"$i\">";
                }
                echo date( "F", mktime( 0,0,0,$i,1,date( "Y" ) ) ) . "\n";
            }
        }
        echo "</select>&nbsp;";
    }
} 


usage
PHP Code:
 $myDate = new dateSelect;
$myDate->sMonth( @$_POST['sMonth'], 'css_class', 'sMonth' ); 
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