$a = array();
$a[0] = 'a';
$a[1] = 1;
$a[10] = 5;
$a[1] = 2.4;
$a = array();
$a[0] = 'a0';
$a['f'] = 'af';
$a[2] = 'he';
$a[1] = 1;
$a[1.7] = '45';
$a['1.7'] = 'a1';
$a['ha'] = 'ahh';
$a['0'] = 'ahh';
print_r($a);
echo $a[1.7] . ' and ' . $a['1.7']. ' and ' . $a[0];
Array
(
[0] => ahh
[f] => af
[2] => he
[1] => 45
[1.7] => a1
[ha] => ahh
)
45 and a1 and ahh
编号为 $a 的项的值为 $b ：
$arr = array($a => $b[, ...])
$a 为值，编号为从0开始的整数。
array($a[, ...])
向数组 $a 内添加项 $b：
array_push($a, $b)