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php »ù´¡±Ê¼Ç array

/***************************by
garcon1986********************************/
<?php
// simple assgin the values
$arr1 = array(12 => 10, 'sjg' => 'yaya');
echo $arr1[12].'<br>'; // 10
echo $arr1['sjg']."<br>"; //yaya
echo "wo ai ni !<p>"; // wo ai ni!
// place an array into another array
$arr2 = array("somearray" => array(6=>5, 13=>9, "a"=>42));
echo $arr2["somearray"][6]."<br>"; //5
echo $arr2["somearray"][13]."<br>"; //9
echo $arr2["somearray"]["a"]."<br>"; //42
// re-define array
$arr3 = array(1=>2, 3=>4, 5=>6);
echo $arr3[1]."<br>"; //2
echo $arr3[3]."<br>"; //4
$arr3 = array(1=>3, 2=>5, 3=>6, 4=>7);
echo $arr3[1]."<br>"; //3
echo $arr3[3]."<br>"; //6
$arr4=array(1,2,3,4,5);
print_r($arr4); //Array([0]=>1 [1]=>2 [2]=>3 [3]=>4 [4]=>5)
echo "<br>";
// Now delete every item, but leave the array itself intact:
foreach($arr4 as $i=>$value){
unset($arr4[$i]);
}
print_r($arr4); //Array()
echo "<br>";
// Append an item (note that the new key is 5, instead of 0).
$arr4[]=6;
print_r($arr4); //Array([5]=>6)
echo "<br>";
// Re-index
$arr4 = array_values($arr4);
$arr4[]=7;
print_r($arr4); //Array([0]=>6 [1]=>7)
echo '<br>';
$arr5 = array(5=>1, 12=>2);
$arr5[]=56;
$arr5["x"]=42;
print_r($arr5); //Array ( [5] => 1 [12] => 2 [13] => 56 [x] => 42 )
echo '<br>';
unset($arr5[5]);
print_r($arr5).'<br>'; //Array ( [12] => 2 [13] => 56 [x] => 42 )
unset($arr5);
echo '<p>';
$charles = array(1=>'one', 2=>'two', 3=>'three');
unset($charles[2]);
print_r($charles);
echo '<br>';
$charles = array_val


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