真诚自定义，多谢

function foo($s) {<br />  $dict = array_flip(explode(',', '/,monday,tuesday,wednesday,thursday,friday,saturday,sunday'));<br />  $dict['/'] = ',';<br />  return strtr(strtolower($s), $dict);<br />}<br /><br />echo foo('Monday/Tuesday/Wednesday/Thursday/Friday/Saturday/Sunday');<br />

<br />function foo($s) {<br />	$array=array('monday'=>1,<br />							'tuesday'=>2,<br />							'wednesday'=>3,<br />							'thursday'=>4,<br />							'friday'=>5,<br />							'saturday'=>6,<br />							'sunday'=>7,<br />							'/'=>',',' '=>',');<br />  return strtr(strtolower($s), $array);<br />} <br />echo foo('Monday Tuesday Wednesday/Thursday/Friday/Saturday/Sunday');<br />

<br>function foo($s) {<br>    $array= array('monday'   =&gt; 1,<br>                 'tuesday'  =&gt; 2,<br>                 'wednesday'=&gt; 3,<br>                 'thursday' =&gt; 4,<br>                 'friday'   =&gt; 5,<br>                 'saturday' =&gt; 6,<br>                 'sunday'   =&gt; 7,<br>                );<br><br>    $sa = preg_split('/\W/',strtolower($s));<br>    $arr = array();<br>    foreach ($sa as $v) {<br>        if(is_numeric($v)) {<br>            $t = array_values($array);<br>            $arr[] = $t[$v-1];<br>        }<br>        else if (isset($array[$v])) {<br>            $arr[] = $array[$v];<br>        }<br>        else {<br>            foreach ($array as $k1 =&gt; $v1 )  {<br>                if ( substr($k1, 0, 4) == $v ) {<br>                    $arr[] = $v1; break;<br>                }<div class="clear"></div>