


This article mainly introduces the implementation method of PHP programming to calculate whether two time periods intersect. Combined with specific examples, it compares and analyzes the conversion and comparison of PHP time periods and other related operating techniques. Friends in need can refer to it
The example of this article describes the implementation method of PHP programming to calculate whether two time periods intersect. Share it with everyone for your reference, the details are as follows:
Pre-optimized version:
/** * PHP计算两个时间段是否有交集(边界重叠不算) * * @param string $beginTime1 开始时间1 * @param string $endTime1 结束时间1 * @param string $beginTime2 开始时间2 * @param string $endTime2 结束时间2 * @return bool */ function is_time_cross($beginTime1 = '', $endTime1 = '', $beginTime2 = '', $endTime2 = '') { $status = $beginTime2 - $beginTime1; if ($status > 0) { $status2 = $beginTime2 - $endTime1; if ($status2 > 0) { return false; } elseif ($status2 < 0) { return true; } else { return false; } } elseif($status < 0) { $status2 = $endTime2 - $beginTime1; if ($status2 > 0) { return true; } else if ($status2 < 0) { return false; } else { return false; } } else { $status2 = $endTime2 - $beginTime1; if ($status2 == 0) { return false; } else { return true; } } }
Optimized version (conditional merge):
/** * PHP计算两个时间段是否有交集(边界重叠不算) * * @param string $beginTime1 开始时间1 * @param string $endTime1 结束时间1 * @param string $beginTime2 开始时间2 * @param string $endTime2 结束时间2 * @return bool */ function is_time_cross($beginTime1 = '', $endTime1 = '', $beginTime2 = '', $endTime2 = '') { $status = $beginTime2 - $beginTime1; if ($status > 0) { $status2 = $beginTime2 - $endTime1; if ($status2 >= 0) { return false; } else { return true; } } else { $status2 = $endTime2 - $beginTime1; if ($status2 > 0) { return true; } else { return false; } } }
Test:
$beginTime1 = strtotime('2015-08-07 06:30'); $endTime1 = strtotime('2015-08-07 08:30'); $beginTime2 = strtotime('2015-08-07 05:30'); $endTime2 = strtotime('2015-08-07 06:31'); echo is_time_cross($beginTime1, $endTime1, $beginTime2, $endTime2);//输出1
The above is the detailed content of Analyze the implementation method of calculating whether two time periods intersect with PHP programming. For more information, please follow other related articles on the PHP Chinese website!

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php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

查找方法:1、用strpos(),语法“strpos("字符串值","查找子串")+1”;2、用stripos(),语法“strpos("字符串值","查找子串")+1”。因为字符串是从0开始计数的,因此两个函数获取的位置需要进行加1处理。


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