php遍历关联数组方法大全(foreach,list,each,list)

<?php 
$sports = array( 
&#39;football&#39; => &#39;good&#39;, 
&#39;swimming&#39; => &#39;very well&#39;, 
&#39;running&#39; => &#39;not good&#39;); 
foreach ($sports as $key => $value) { 
echo $key.": ".$value."<br />"; 
?>

football: good 
swimming: very well 
running: not good

<?php 
$sports = array( 
&#39;football&#39; => &#39;good&#39;, 
&#39;swimming&#39; => &#39;very well&#39;, 
&#39;running&#39; => &#39;not good&#39;); 
while ($elem = each($sports)) { 
echo $elem[&#39;key&#39;].": ".$elem[&#39;value&#39;]."<br />"; 
?>

<?php 
$sports = array( 
&#39;football&#39; => &#39;good&#39;, 
&#39;swimming&#39; => &#39;very well&#39;, 
&#39;running&#39; => &#39;not good&#39;); 
while (list($key, $value) = each($sports)) { 
echo $key.": ".$value."<br />"; 
?>

<?php
    $urls= array(&#39;aaa&#39;,&#39;bbb&#39;,&#39;ccc&#39;,&#39;ddd&#39;);
    while(list($key,$val)= each($urls)) {
      echo "This Site url is $val.<br />";
    }
?>

<?php
    $urls= array(&#39;aaa&#39;,&#39;bbb&#39;,&#39;ccc&#39;,&#39;ddd&#39;);
    for ($i= 0;$i< count($urls); $i++){
      $str= $urls[$i];
      echo "This Site url is $str.<br />";
    }
?>