Home  >  Article  >  Backend Development  >  Solving PHP tables: the nature of elements, columns or rows?

Solving PHP tables: the nature of elements, columns or rows?

WBOY
WBOYOriginal
2024-04-09 12:42:011174browse

PHP The essence of the table element: Table structure: The table is composed of

tags, the rows are composed of tags, and the cells are composed of row, forming columns. Row layout: elements are arranged next to each other in a
tags. Column layout: elements are arranged next to each other within a
to form rows.

Solving PHP tables: the nature of elements, columns or rows?

Solving PHP tables: the nature of elements, columns or rows?

Tables in PHP organize data using the <table>, <code><tr>, and <code><td> tags. <code><table> is the table itself, <code><tr> is the row, <code><td> is the cell. <p>Understanding the nature of elements is critical to traversing and manipulating tabular data. </p> <p><strong>Columns vs Rows</strong></p> <ul><li> <strong>Columns: </strong><code><td> Elements in a <code> Arrange adjacently within the row.

  • Row: <tr> An element is a group of <code><td> arranged adjacently in <table> <code> Cell.

    Practical case: Get table data

    Consider the following table:

    <table>
      <tr>
        <td>姓名</td>
        <td>年龄</td>
      </tr>
      <tr>
        <td>Alice</td>
        <td>25</td>
      </tr>
      <tr>
        <td>Bob</td>
        <td>30</td>
      </tr>
    </table>

    To get the names of all rows in the table:

    $table = document->getElementsByTagName('table')[0];
    $rows = $table->getElementsByTagName('tr');
    
    $names = [];
    foreach ($rows as $row) {
      $cells = $row->getElementsByTagName('td');
      $name = $cells[0]->textContent;
      $names[] = $name;
    }

    To get all cells in column 1 of the table:

    $cells = $table->getElementsByTagName('td');
    $column1 = [];
    foreach ($cells as $cell) {
      if ($cell->parentNode === $rows[0]) {
        $column1[] = $cell->textContent;
      }
    }

    Conclusion

    Understanding the nature of PHP table elements (rows and columns) is essential to effectively Traversing and manipulating tabular data is critical.

  • The above is the detailed content of Solving PHP tables: the nature of elements, columns or rows?. For more information, please follow other related articles on the PHP Chinese website!

    Statement:
    The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn