wordpress 添加 显示磁盘剩余空间百分比的插件

在 wp-content/plugins 文件夹下

我取的文件名是: folder-sizes-dashboard-widget.php

在仪表盘 可以看到 Folder Sizes 标题的Box

<?php
/*
Plugin Name: Folder Sizes Dashboard Widget
Plugin URI: http://wordpress.stackexchange.com/q/67876/12615
Description: List the following folder sizes in a Dashboard Widget: Uploads dir, WP Content dir, WordPress base dir.
Observation: PHP folder size functions from this Answer: https://stackoverflow.com/a/8348396/1287812
*/

add_action( 'wp_dashboard_setup', 'wpse_67876_wp_dashboard_setup' );

function wpse_67876_wp_dashboard_setup()
{
    // Admins only
    if( current_user_can( 'install_plugins' ) )
        wp_add_dashboard_widget( 'wpse_67876_folder_sizes', __( 'Folder Sizes' ), 'wpse_67876_wp_add_dashboard_widget' );
}

function wpse_67876_wp_add_dashboard_widget()
{
    $upload_dir     = wp_upload_dir();
    $upload_space   = wpse_67876_foldersize( $upload_dir['basedir'] );
    $content_space  = wpse_67876_foldersize( WP_CONTENT_DIR );
    $wp_space       = wpse_67876_foldersize( ABSPATH );

    /* ABSOLUTE paths not being shown in Widget */

    // echo '<b>' . $upload_dir['basedir'] . ' </b><br />';
    echo '<i>Uploads</i>: ' . wpse_67876_format_size( $upload_space ) . '<br /><br />';

    // echo '<b>' . WP_CONTENT_DIR . ' </b><br />';
    echo '<i>wp-content</i>: ' . wpse_67876_format_size( $content_space ) . '<br /><br />';  

    if( is_multisite() )
    {
        echo '<i>wp-content/blogs.dir</i>: ' . wpse_67876_format_size( wpse_67876_foldersize( WP_CONTENT_DIR . '/blogs.dir' ) ) . '<br /><br />';
    }

    // echo '<b>' . ABSPATH . ' </b><br />';
    echo '<i>WordPress</i>: ' . wpse_67876_format_size( $wp_space );    

    $calc_root_path = ABSPATH;
     /* get disk space free (in bytes) */
    $df = disk_free_space($calc_root_path);
    /* and get disk space total (in bytes)  */
    $dt = disk_total_space($calc_root_path);
    /* now we calculate the disk space used (in bytes) */
    $du = $dt - $df;
    /* percentage of disk used - this will be used to also set the width % of the progress bar */
    $dp = sprintf('%.2f',($du / $dt) * 100);

    /* and we formate the size from bytes to MB, GB, etc. */
    $df = my_custom_format_size($df);
    $du = my_custom_format_size($du);
    $dt = my_custom_format_size($dt);

    ?>
    <style type='text/css'>

.progress {
        border: 2px solid #5E96E4;
        height: 32px;
        width: 540px;
        margin: 30px auto;
}
.progress .prgbar {
        background: #A7C6FF;
        position: relative;
        height: 32px;
        z-index: 999;
}
.progress .prgtext {
        color: #286692;
        text-align: center;
        font-size: 13px;
        padding: 9px 0 0;
        width: 540px;
        position: absolute;
        z-index: 1000;
}
.progress .prginfo {
        margin: 3px 0;
}

</style>
    <div class='progress'>
            <div class='prgtext'><?php echo $dp; ?>% Disk Used</div>
            <div class='prgbar' style="width:<?php echo $dp; ?>%;"></div>
            <div class='prginfo'>
                    <span style='float: left;'><?php echo "$du of $dt used"; ?></span>
                    <span style='float: right;'><?php echo "$df of $dt free"; ?></span>
                    <span style='clear: both;'></span>
            </div>
    </div>
    <?php
}

if(!function_exists('my_custom_format_size')){
    function my_custom_format_size( $bytes )
    {
            $types = array( 'B', 'KB', 'MB', 'GB', 'TB' );
            for( $i = 0; $bytes >= 1024 && $i < ( count( $types ) -1 ); $bytes /= 1024, $i++ );
                    return( round( $bytes, 2 ) . " " . $types[$i] );
    }
}

function wpse_67876_foldersize( $path )
{
    $total_size = 0;
    $files = scandir( $path );
    $cleanPath = rtrim( $path, '/' ) . '/';

    foreach( $files as $t ) {
        if ( '.' != $t && '..' != $t )
        {
            $currentFile = $cleanPath . $t;
            if ( is_dir( $currentFile ) )
            {
                $size = wpse_67876_foldersize( $currentFile );
                $total_size += $size;
            }
            else
            {
                $size = filesize( $currentFile );
                $total_size += $size;
            }
        }
    }

    return $total_size;
}

function wpse_67876_format_size($size)
{
    $units = explode( ' ', 'B KB MB GB TB PB' );

    $mod = 1024;

    for ( $i = 0; $size > $mod; $i++ )
        $size /= $mod;

    $endIndex = strpos( $size, "." ) + 3;

    return substr( $size, 0, $endIndex ) . ' ' . $units[$i];
}

---

通过PHP显示 磁盘剩余空间

步骤1 - PHP代码

替换需要统计的路径calc_root_path的值

 $calc_root_path = '/home/vagrant';
 /* get disk space free (in bytes) */
 $df = disk_free_space($calc_root_path);
 /* and get disk space total (in bytes)  */
 $dt = disk_total_space($calc_root_path);
 /* now we calculate the disk space used (in bytes) */
 $du = $dt - $df;
 /* percentage of disk used - this will be used to also set the width % of the progress bar */
 $dp = sprintf('%.2f',($du / $dt) * 100);

/* and we formate the size from bytes to MB, GB, etc. */
$df = my_custom_format_size($df);
$du = my_custom_format_size($du);
$dt = my_custom_format_size($dt);

步骤2 - css 样式

这是进度条的样式,你可以将这个样式代码，放入到你要存放的web路径中，让 步骤1 的php代码可以引入到这个css样式

<style type='text/css'>

.progress {
        border: 2px solid #5E96E4;
        height: 32px;
        width: 540px;
        margin: 30px auto;
}
.progress .prgbar {
        background: #A7C6FF;
        position: relative;
        height: 32px;
        z-index: 999;
}
.progress .prgtext {
        color: #286692;
        text-align: center;
        font-size: 13px;
        padding: 9px 0 0;
        width: 540px;
        position: absolute;
        z-index: 1000;
}
.progress .prginfo {
        margin: 3px 0;
}

</style>

步骤3 HTML 代码

你可以选择将这短代码放入到web 目录的一个php文件中。这个HTML代码能够放入到步骤1创建的php文件或者是独立分开的文件。

<div class='progress'>
        <div class='prgtext'><?php echo $dp; ?>% Disk Used</div>
        <div class='prgbar'></div>
        <div class='prginfo'>
                <span style='float: left;'><?php echo "$du of $dt used"; ?></span>
                <span style='float: right;'><?php echo "$df of $dt free"; ?></span>
                <span style='clear: both;'></span>
        </div>
</div>

References

1. Display Disk Free Space Percentage In PHP
2. How to Check Disk Space used by Media Library