php中日期时间比较三个函数
文章介绍了三种常用的日期时间比较格式的函数，一个是对整日期，一个是只对时间比较，最后一个是专业比较时间差可以到秒。
日期比较如 2011-11-11 2011-12-12, 代码如下:
function compare_date( $DATE1 , $DATE2 ) { $STR = strtok ( $DATE1 , "-" ); $YEAR1 = $STR ; $STR = strtok ( "-" ); $MON1 = $STR ; $STR = strtok ( "-" ); $DAY1 = $STR ; $STR = strtok ( $DATE2 , "-" ); $YEAR2 = $STR ; $STR = strtok ( "-" ); $MON2 = $STR ; $STR = strtok ( "-" ); $DAY2 = $STR ; if ( $YEAR2 < $YEAR1 ) { return 1; } if ( $YEAR1 < $YEAR2 ) { return -1; } if ( $MON2 < $MON1 ) { return 1; } if ( $MON1 < $MON2 ) { return -1; } if ( $DAY2 < $DAY1 ) { return 1; } if ( $DAY1 < $DAY2 ) { return -1; } return 0; }格式：12.00 -13.11, 代码如下:
function compare_time( $TIME1 , $TIME2 ) { $STR = strtok ( $TIME1 , ":" ); $HOUR1 = $STR ; $STR = strtok ( ":" ); $MIN1 = $STR ; $STR = strtok ( ":" ); $SEC1 = $STR ; $STR = strtok ( $TIME2 , ":" ); $HOUR2 = $STR ; $STR = strtok ( ":" ); $MIN2 = $STR ; $STR = strtok ( ":" ); $SEC2 = $STR ; if ( $HOUR2 < $HOUR1 ) { return 1; } if ( $HOUR1 < $HOUR2 ) { return -1; } if ( $MIN2 < $MIN1 ) { return 1; } if ( $MIN1 < $MIN2 ) { return -1; } if ( $SEC2 < $SEC1 ) { return 1; } if ( $SEC1 < $SEC2 ) { return -1; } return 0; }格式:2011-11-12 1:6:25,2011-12-13 1:2:35, 代码如下:
function compare_date_time( $DATE_TIME1 , $DATE_TIME2 ) { if ( $DATE_TIME1 == NULL || strlen ( $DATE_TIME1 ) == 0 || $DATE_TIME2 == NULL || strlen ( $DATE_TIME2 ) == 0 ) { return -1; } $DATE_TIME1_ARRY = explode ( " " , $DATE_TIME1 ); $DATE_TIME2_ARRY = explode ( " " , $DATE_TIME2 ); if ( compare_date( $DATE_TIME1_ARRY [0], $DATE_TIME2_ARRY [0] ) == 1 ) { return 1; } if ( compare_date( $DATE_TIME1_ARRY [0], $DATE_TIME2_ARRY [0] ) == 0 ) { if ( compare_time( $DATE_TIME1_ARRY [1], $DATE_TIME2_ARRY [1] ) == 1 ) { return 1; } if ( compare_time( $DATE_TIME1_ARRY [1], $DATE_TIME2_ARRY [1] ) == 0 ) { return 0; } return -1; } return -1; }查看更多关于php中日期时间比较三个函数 - php日期的详细内容...
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