Question

我正在尝试格式化我正在创建的文件，以便每个名称/值对都在其自己的行上

我确信这很简单，但我的.ini文件根本没有格式化换行符。我错过了什么？

function wpseTest()
{
    $query = "SELECT option_name, option_value FROM wp_options where option_name like 'test|_%' escape '|' AND option_value > ''";
    global $wpdb;
    $matches = $wpdb->get_results($query);

    $mySettings = '[settings]\r\n';

    foreach ($matches as $result){
        $mySettings .= $result->option_name;
        $mySettings .= ' = ';
        $mySettings .= $result->option_value;
        $mySettings .= '\r\n';
    }

    $mySettingsFileLocation = WP_PLUGIN_DIR.'/test/settings-backup.ini';
    $mySettingsFile = fopen($mySettingsFileLocation, 'w');
    fwrite($mySettingsFile, $mySettings);
    fclose($mySettingsFile);
}

Answer 1

\r和\n等特殊字符不会在单引号中解释。改为使用双引号。

$mySettings = "[settings]\r\n";

和

$mySettings .= "\r\n";

Answer 2

您可以使用平台相关常量PHP_EOL代替

$mySettings = '[settings]' . PHP_EOL;
// ..
$mySettings .= PHP_EOL;

Answer 3

// Outputs: This will not expand: \n a newline
echo 'This will not expand: \n a newline';

put it in double quotes

function wpseTest()
{
    $query = "SELECT option_name, option_value FROM wp_options where option_name like 'test|_%' escape '|' AND option_value > ''";
    global $wpdb;
    $matches = $wpdb->get_results($query);

    $mySettings = "[settings]\r\n";

    foreach ($matches as $result){
        $mySettings .= $result->option_name;
        $mySettings .= ' = ';
        $mySettings .= $result->option_value;
        $mySettings .= "\r\n";
    }

    $mySettingsFileLocation = WP_PLUGIN_DIR.'/test/settings-backup.ini';
    $mySettingsFile = fopen($mySettingsFileLocation, 'w');
    fwrite($mySettingsFile, $mySettings);
    fclose($mySettingsFile);
}

通过fwrite为输出文件添加换行符

3 个答案: