如何在PHP中获取关联数组的数字索引？
要获取关联数组的数字索引，代码如下-
示例
<?php
$arr = array( "a"=>"5", "b"=>"20", "c"=>"35", "d"=>"55");
$keys = array_keys( $arr );
echo "Array key and value...\n";
for($x = 0; $x < sizeof($arr); $x++ ) {
echo "key: ". $keys[$x] . ", value: ". $arr[$keys[$x]] . "\n";
}
?>输出结果
Array key and value... key: a, value: 5 key: b, value: 20 key: c, value: 35 key: d, value: 55
示例
现在让我们来看另一个例子-
<?php
$arr = array( "p"=>"150", "q"=>"100", "r"=>"120", "s"=>"110");
$keys = array_keys( $arr );
echo "Array key and value...\n";
for($x = 0; $x < sizeof($arr); $x++ ) {
echo "key: ". $keys[$x] . ", value: ". $arr[$keys[$x]] . "\n";
}
$arr[$keys[3]] = "25";
echo "\nUpdated Array key and value...\n";
for($x = 0; $x < sizeof($arr); $x++ ) {
echo "key: ". $keys[$x] . ", value: ". $arr[$keys[$x]] . "\n";
}
?>输出结果
Array key and value... key: p, value: 150 key: q, value: 100 key: r, value: 120 key: s, value: 110 Updated Array key and value... key: p, value: 150 key: q, value: 100 key: r, value: 120 key: s, value: 25