php change table

PHP is a server-side scripting language capable of writing dynamic web pages. PHP code can be embedded in an HTML file, and after execution, pure HTML code will be returned to the client browser to display the required Web page. When developing web applications using PHP, manipulating tables is a very common task. This article will introduce how to use PHP to change tables.

1. Add table rows

Adding new rows to a table is a frequently performed task. This functionality can be easily achieved using PHP. Below is an example showing how to add table rows using PHP.

<?php
    // 定义表格数据
    $table_data = array(
        array('Alice', '25', 'New York'),
        array('Bob', '30', 'Los Angeles'),
        array('Charlie', '35', 'Chicago')
    );
    
    // 输出原始表格
    echo '<table>';
    foreach ($table_data as $row) {
        echo '<tr>';
        foreach ($row as $cell) {
            echo '<td>' . $cell . '</td>';
        }
        echo '</tr>';
    }
    echo '</table>';
    
    // 在表格底部添加一行
    $new_row = array('Dave', '40', 'Houston');
    array_push($table_data, $new_row);
    
    // 输出新表格
    echo '<table>';
    foreach ($table_data as $row) {
        echo '<tr>';
        foreach ($row as $cell) {
            echo '<td>' . $cell . '</td>';
        }
        echo '</tr>';
    }
    echo '</table>';
?>

In this example, an array containing table data $table_data is first defined. Then, a foreach loop is used to output the original table. Next, a new row was added at the bottom of the table and the modified table was re-exported.

2. Delete table rows

You can also easily delete table rows using PHP. Below is an example that demonstrates how to delete table rows using PHP.

<?php
    // 定义表格数据
    $table_data = array(
        array('Alice', '25', 'New York'),
        array('Bob', '30', 'Los Angeles'),
        array('Charlie', '35', 'Chicago')
    );
    
    // 输出原始表格
    echo '<table>';
    foreach ($table_data as $row) {
        echo '<tr>';
        foreach ($row as $cell) {
            echo '<td>' . $cell . '</td>';
        }
        echo '</tr>';
    }
    echo '</table>';
    
    // 删除表格中的第二行，即Bob所在的行
    unset($table_data[1]);
    
    // 重新索引数组
    $table_data = array_values($table_data);
    
    // 输出新表格
    echo '<table>';
    foreach ($table_data as $row) {
        echo '<tr>';
        foreach ($row as $cell) {
            echo '<td>' . $cell . '</td>';
        }
        echo '</tr>';
    }
    echo '</table>';
?>

In this example, a foreach loop is also used to output the original table. Then, use the PHP function unset() to delete the second row in the table, which is Bob's row. Then, use the PHP function array_values() to re-index the array and output the modified table.

3. Modify table data

In addition to adding and deleting table rows, PHP can also modify table data. Below is an example showing how to modify table data using PHP.

<?php
    // 定义表格数据
    $table_data = array(
        array('Alice', '25', 'New York'),
        array('Bob', '30', 'Los Angeles'),
        array('Charlie', '35', 'Chicago')
    );
    
    // 输出原始表格
    echo '<table>';
    foreach ($table_data as $row) {
        echo '<tr>';
        foreach ($row as $cell) {
            echo '<td>' . $cell . '</td>';
        }
        echo '</tr>';
    }
    echo '</table>';
    
    // 修改表格数据，将Charlie的年龄改为40岁
    $table_data[2][1] = '40';
    
    // 输出新表格
    echo '<table>';
    foreach ($table_data as $row) {
        echo '<tr>';
        foreach ($row as $cell) {
            echo '<td>' . $cell . '</td>';
        }
        echo '</tr>';
    }
    echo '</table>';
?>

In this example, a foreach loop is also used to output the original table. Then, modify Charlie's age to 40 years old. Finally, output the modified table.

4. Change table style

In addition to changing table data, PHP can also change the style of the table. Below is an example showing how to change the style of a table using PHP.

<?php
    // 定义表格数据
    $table_data = array(
        array('Alice', '25', 'New York'),
        array('Bob', '30', 'Los Angeles'),
        array('Charlie', '35', 'Chicago')
    );
    
    // 输出原始表格
    echo '<table>';
    foreach ($table_data as $row) {
        echo '<tr>';
        foreach ($row as $cell) {
            echo '<td style="border: 1px solid black; padding: 5px;">' . $cell . '</td>';
        }
        echo '</tr>';
    }
    echo '</table>';
    
    // 将表格边框加粗
    echo "<style>
        table {
            border: 2px solid black;
        }
        td {
            border: 1px solid black;
            padding: 5px;
        }
    </style>";
    
    // 输出新表格
    echo '<table>';
    foreach ($table_data as $row) {
        echo '<tr>';
        foreach ($row as $cell) {
            echo '<td>' . $cell . '</td>';
        }
        echo '</tr>';
    }
    echo '</table>';
?>

In this example, style information is added to the original table, setting the table's borders and the cell's borders and padding. Then, use the <style> tag to make the border bold. Finally, the table after the style change is output.

Conclusion

Using PHP, you can easily change the table, and you can add, delete, modify, style changes and other operations. Master these skills and you will be more comfortable operating tables when writing web applications in PHP.

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