<span style="color: #008080;"> 1</span> <span style="color: #008000;">/*</span><span style="color: #008000;">* </span><span style="color: #008080;"> 2</span> <span style="color: #008000;">* 把KB转化为KB及以上单位 </span><span style="color: #008080;"> 3</span> <span style="color: #008000;">* @param int $kb </span><span style="color: #008080;"> 4</span> <span style="color: #008000;">* @return string $new_val </span><span style="color: #008080;"> 5</span> <span style="color: #008000;">*/</span> <span style="color: #008080;"> 6</span> <span style="color: #0000ff;">function</span> return_over_kb(<span style="color: #800080;">$kb</span><span style="color: #000000;">) </span><span style="color: #008080;"> 7</span> <span style="color: #000000;">{ </span><span style="color: #008080;"> 8</span> <span style="color: #800080;">$kb</span> /= 1024<span style="color: #000000;">; </span><span style="color: #008080;"> 9</span> <span style="color: #800080;">$unit</span> = 0; <span style="color: #008000;">//</span><span style="color: #008000;"> 0KB/MB 1GB 2TB 3PB 4EB</span> <span style="color: #008080;">10</span> <span style="color: #0000ff;">while</span> (<span style="color: #800080;">$kb</span> >= 1024<span style="color: #000000;">) { </span><span style="color: #008080;">11</span> <span style="color: #800080;">$kb</span> /= 1024<span style="color: #000000;">; </span><span style="color: #008080;">12</span> <span style="color: #800080;">$unit</span>++<span style="color: #000000;">; </span><span style="color: #008080;">13</span> <span style="color: #000000;"> } </span><span style="color: #008080;">14</span> <span style="color: #0000ff;">switch</span> (<span style="color: #800080;">$unit</span><span style="color: #000000;">) { </span><span style="color: #008080;">15</span> <span style="color: #0000ff;">case</span> 1: <span style="color: #800080;">$b</span> = 'GB'; <span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #008080;">16</span> <span style="color: #0000ff;">case</span> 2: <span style="color: #800080;">$b</span> = 'TB'; <span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #008080;">17</span> <span style="color: #0000ff;">case</span> 3: <span style="color: #800080;">$b</span> = 'PB'; <span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #008080;">18</span> <span style="color: #0000ff;">case</span> 4: <span style="color: #800080;">$b</span> = 'EB'; <span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #008080;">19</span> <span style="color: #0000ff;">default</span>: <span style="color: #008080;">20</span> <span style="color: #0000ff;">if</span> (<span style="color: #800080;">$kb</span> >= 1<span style="color: #000000;">) { </span><span style="color: #008080;">21</span> <span style="color: #800080;">$b</span> = 'MB'<span style="color: #000000;">; </span><span style="color: #008080;">22</span> } <span style="color: #0000ff;">else</span><span style="color: #000000;"> { </span><span style="color: #008080;">23</span> <span style="color: #800080;">$b</span> = 'KB'<span style="color: #000000;">; </span><span style="color: #008080;">24</span> <span style="color: #000000;"> } </span><span style="color: #008080;">25</span> <span style="color: #0000ff;">break</span><span style="color: #000000;">; </span><span style="color: #008080;">26</span> <span style="color: #000000;"> } </span><span style="color: #008080;">27</span> <span style="color: #008080;">28</span> <span style="color: #0000ff;">if</span> (<span style="color: #800080;">$unit</span> == 0) { <span style="color: #008000;">//</span><span style="color: #008000;"> 要么是KB 要么是MB</span> <span style="color: #008080;">29</span> <span style="color: #0000ff;">if</span> (<span style="color: #800080;">$kb</span> < 1<span style="color: #000000;">) { </span><span style="color: #008080;">30</span> <span style="color: #800080;">$kb</span> *= 1024<span style="color: #000000;">; </span><span style="color: #008080;">31</span> <span style="color: #000000;"> } </span><span style="color: #008080;">32</span> <span style="color: #000000;"> } </span><span style="color: #008080;">33</span> <span style="color: #008080;">34</span> <span style="color: #0000ff;">return</span> <span style="color: #008080;">round</span>(<span style="color: #800080;">$kb</span>, 1) . <span style="color: #800080;">$b</span><span style="color: #000000;">; </span><span style="color: #008080;">35</span> }