Detailed introduction to calculation rules

About the rendering rules of table width. The calculation method of table cell width is mainly divided into two methods: fixed table layout and automatic table layout. People who often write CSS should still know this, but we often find that table columns are Setting the width does not work, or is it normal to render without a fixed width? Let’s introduce how these two methods calculate rendering. First set a few common variables: tableWidth = table width = 100% tableBorderWidth = left and right border width of table tdBorderWidth = sum of left and right border widths of all columns (merged borders count as 1px) tdPadding = left and right padding of all columns and tdWidth = all defined The width of the column of width and tdLength = the number of columns 1. Fixed table layout, add table-layout: fixedps to the table: In the fixed table layout, the width of the table column has nothing to do with the column content, only the table width, column width, table Related to left and right borders, left and right column borders, and left and right column padding. By using a fixed table layout, the user agent can display the table after receiving the first row, that is, only the first row

1. html A detailed introduction to the calculation rules for table cell width

##Introduction: Calculation of table cell width The methods are mainly divided into two methods: fixed table layout and automatic table layout. People who often write CSS should still know this, but we often find that setting the width of the table does not work, or the width is not rendered. Is it normal? Let’s introduce how these two methods calculate rendering.

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3. How does PHP calculate which database to insert based on uid

Introduction: How does PHP calculate which database to insert based on uid? I now want to implement a function: to calculate the uid of 2 million users through calculation rules, corresponding to different insert log tables, how to calculate it, and how to balance the table? ------Solution--------------------uid is usually a number, just take the modulus ------Solution---- ----------------Does this require code? Order&nbs

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