如何在PHP中重新索引数组
要在PHP中重新索引数组，代码如下-
示例
<?php
$arr = array( 0=>"150", 1=>"100", 2=>"120", 3=>"110", 4=>"115" );
echo "Array...\n";
foreach( $arr as $key => $value) {
echo " Key = " . $key . ", Value = " . $value . "\n";
}
$arr = array_combine(range(2,
count($arr) + (1)),
array_values($arr));
echo "\nArray after re-indexing\n";
foreach( $arr as $key => $value) {
echo " Key = " . $key . ", Value = " . $value . "\n";
}
?>输出结果
这将产生以下输出-
Array... Key = 0, Value = 150 Key = 1, Value = 100 Key = 2, Value = 120 Key = 3, Value = 110 Key = 4, Value = 115 重新索引后的数组 Key = 2, Value = 150 Key = 3, Value = 100 Key = 4, Value = 120 Key = 5, Value = 110 Key = 6, Value = 115
示例
现在让我们来看另一个示例-
<?php
$arr = array( "a"=>"150", "b"=>"100", "c"=>"120", "d" =>"110", "e"=>"115" );
echo "Array...\n";
foreach( $arr as $key => $value) {
echo " Key = " . $key . ", Value = " . $value . "\n";
}
$arr = array_combine(range("b",
chr(count($arr) + (ord("b")-1))),
array_values($arr));
echo "\nArray after re-indexing\n";
foreach( $arr as $key => $value) {
echo " Key = " . $key . ", Value = " . $value . "\n";
}
?>输出结果
这将产生以下输出-
Array... Key = a, Value = 150 Key = b, Value = 100 Key = c, Value = 120 Key = d, Value = 110 Key = e, Value = 115 重新索引后的数组 Key = b, Value = 150 Key = c, Value = 100 Key = d, Value = 120 Key = e, Value = 110 Key = f, Value = 115
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