创建3行2列的表格

<?php

/**
 * 创建3行2列的表格
 * @return string
 */
function createTable()
{
    $table = "<table border='1' cellpadding='0' cellspacing='0' width='80%'>";
    for ($i = 1; $i <= 3; $i++) {
        $table .= "<tr>";
        for ($j = 1; $j <= 2; $j++) {
            $table .= "<td>x</td>";
        }
        $table .= "<tr/>";
    }

    $table .= "</table/>";
    return $table;
}

echo createTable();

?>

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<?php

/**
 * @param int $rows
 * @param int $cols
 * @param string $bgColor
 * @param string $content
 * @return string
 */
function createTable($rows = 3, $cols = 5, $bgColor = 'red', $content = "x")
{
    $table = "<table border='1' cellpadding='0' cellspacing='0' width='80%' bgcolor='{$bgColor}'>";
    for ($i = 1; $i <= $rows; $i++) {
        $table .= "<tr>";
        for ($j = 1; $j <= $cols; $j++) {
            $table .= "<td>{$content}</td>";
        }
        $table .= "<tr/>";
    }

    $table .= "</table/>";
    return $table;
}

echo createTable();

?>

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必选参数一定在可选参数之前

<?php

/**
 * @param int $rows
 * @param int $cols
 * @param string $bgColor
 * @param string $content
 * @return string
 */
function createTable($rows, $cols, $bgColor = 'red', $content = "x")
{
    $table = "<table border='1' cellpadding='0' cellspacing='0' width='80%' bgcolor='{$bgColor}'>";
    for ($i = 1; $i <= $rows; $i++) {
        $table .= "<tr>";
        for ($j = 1; $j <= $cols; $j++) {
            $table .= "<td>{$content}</td>";
        }
        $table .= "<tr/>";
    }

    $table .= "</table/>";
    return $table;
}

echo createTable(2, 3);


?>

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