PHP exercises, PHP exercises_PHP tutorial

PHP small exercises, PHP exercises A few days ago on Baidu I saw a netizen asking how to make a small program: Designed in PHP language A small program that calculates the number of days from today to the next month, outputs all these days, and displays the daily dates in three colors in a cycle. Set up three forms to let the user select the font color, and then cycle through the three colors to reflect the output. on those dates. I just had time to make it for him today. This actually has no practical use, but novice friends can use it as a small PHP practice project to become familiar with or deepen their understanding of PHP!

At that time I gave him the general idea as follows:

1. To calculate the number of days from today to the next month, you can use two arrays, one array to access months with 30 days, and one array to access months with 31 days (of course there are also 29 and 28 days, this can be done Study it carefully yourself, the above are just examples)! Then get the month of the day and see in which array the total number of days in the current month is determined. Then you can output all the days from the current day to the end of the month!

2. Let the user choose three font colors. I think a form will do. Use a checkbox to let the user choose the three colors they like!

3. Loop out three colors, I think it can be done like this!

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//$color 是存储三种颜色的数组 //$date 是存储所有天数的数组 $i = 0; $content = '' ; foreach ( $date as $value ) { $content .= ' . $color [ $i ]. '">' . $value . ' ' ; $i ; if ( $i > 2) $i = 0; }

This way $content contains all the days and has a color style!

The following is the specific code of the above PHP small exercise project that I wrote. You can take a look and please correct me if I am wrong!

First, the HTML part of the code allows users to choose their own colors (no number of colors are specified)

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form method = "post" > input type = "checkbox" value = "red" name = "color[]" /> 红 input type = "checkbox" value = "black" name = "color[]" /> 黑 input type = "checkbox" value = "blue" name = "color[]" /> 蓝 input type = "checkbox" value = "yellow" name = "color[]" /> 黄 input type = "checkbox" value = "green" name = "color[]" /> 绿 input type = "submit" value = "提交" name = "send" /> form >

Then the PHP backend code

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if (isset( $_POST [ 'send' ])) { //获取颜色 $color = $_POST [ 'color' ]; //计算天数 $date = date ( 'Y-m-d' , time()); $dates = explode ( '-' , $date ); $sy = array ( '1' , '3' , '5' , '7' , '8' , '10' , '12' ); $ss = array ( '4' , '6' , '9' , '11' ); //判断 if (in_array( $dates [1], $sy )) { $day = range( $dates [2], 31); } elseif (in_array( $dates [1], $ss )) { $day = range( $dates [2], 30); } else else { { if if (( (( $dates $dates [0]%4 == 0 && [0]%4 == 0 && $dates $dates [0]0 != 0) [0]0 != 0) || ( || ( $dates $dates [0]0 == 0 && [0]0 == 0 && $dates $dates [0]@0 == 0)) { [0]@0 == 0)) { $day $day = range( = range( $dates $dates [2], 29); [2], 29); } } else else { { $day $day = range( = range( $dates $dates [2], 28); [2], 28); } } } } //将天数与颜色搭配 //将天数与颜色搭配 $i $i = 0; = 0; $content $content = = '' '' ; ; foreach foreach ( ( $day $day as as $value $value ) { ) { $content $content .= .= ' ' . . $color $color [ [ $i $i ]. ]. '">' '">' . . $value $value . . ' ' ' ' ; ; $i $i ; ; if if ( ( $i $i > ( > ( count count ( ( $color $color )-1)) )-1)) $i $i = 0; = 0; } } echo echo $content $content ; ;

This way $content can output the desired effect!

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