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

复制代码

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         {                 return 1;         }         if ( $YEAR1         {                 return -1;         }         if ( $MON2         {                 return 1;         }         if ( $MON1         {                 return -1;         }         if ( $DAY2         {                 return 1;         }         if ( $DAY1         {                 return -1;         }         return 0; }

格式：12.00 -13.11

代码如下

复制代码

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         {                 return 1;         }         if ( $HOUR1         {                 return -1;         }         if ( $MIN2         {                 return 1;         }         if ( $MIN1         {                 return -1;         }         if ( $SEC2         {                 return 1;         }         if ( $SEC1         {                 return -1;         }         return 0; }

格式:2011-11-12 1:6:25   ,2011-12-13 1:2:35

代码如下

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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; }