Use border-collapse

Example analysis:

The border-collapse property is used to set whether the borders of the table are merged into a single border.

The attribute values that can be set are:

● Separate: Default value, the border will be separated; border-spacing and empty will not be ignored -cells property

●Collapse: If possible, borders will be merged into a single border; border-spacing and empty-cells properties will be ignored

Note: All major browsers support the border-collapse attribute; if !DOCTYPE is not specified, the border-collapse attribute may have unexpected effects.

Continuing Learning

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>php中文网(php.cn)</title> 
<style>
table {
 border-collapse: collapse;
}
table, td, th {
 border: 1px solid black;
 padding:10px 15px;
}
</style>
</head>
<body>
<table>
<tr>
<th>姓名</th>
<th>年龄</th>
</tr>
<tr>
<td>Peter</td>
<td>20岁</td>
</tr>
<tr>
<td>Griffin</td>
<td>23岁</td>
</tr>
</table>
</body>
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