请允许我解释一下,这一法典为什么不起作用:
<?php
for($i = 0; $i < 3; $i++) {
for($j = 0; $j < 3; $j++) {
$arr[$i][$j] = $i.$j;
}
}
foreach ($arr as $key => $value) {
foreach ($value as $key2 => $value2){ // line 8 = error
echo $key." ".$key2."<br />";
}
}
?>
我发现这一错误:
警告:在C:wampwwwscriptindex.中,为 foreach()提供了无效的论点。 第8行
我根本不能理解为什么我得出这一错误。 应以两者的数值启动阵列。 RIght?
我已尝试过这一试验,并将之作为与西经共体项目2.2的产出:
0 0
0 1
0 2
1 0
1 1
1 2
2 0
2 1
2 2
你们是否使用最近的amp? 尝试下载和安装新版本。
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