{"id":587,"date":"2022-05-18T23:57:25","date_gmt":"2022-05-18T23:57:25","guid":{"rendered":"http:\/\/www.nywzjs.com\/?p=587"},"modified":"2022-06-11T02:13:54","modified_gmt":"2022-06-11T02:13:54","slug":"%e5%9c%a8php%e7%9a%84foreach%e4%b8%ad%ef%bc%8c%e5%8a%a0%e7%9a%84%e4%bd%9c%e7%94%a8","status":"publish","type":"post","link":"http:\/\/www.nywzjs.com\/?p=587","title":{"rendered":"\u5728PHP\u7684Foreach\u4e2d\uff0c\u52a0&\u7684\u4f5c\u7528"},"content":{"rendered":"\n

foreach \u52a0&\u904d\u5386\u7684\u540c\u65f6\u6539\u53d8\u539f\u6570\u7ec4\u5373\u4fee\u6539\u6570\u636e\u6216\u8005\u589e\u52a0\u6570\u636e<\/p>\n\n\n\n

foreach \u52a0& \u4ec0\u4e48\u610f\u601d\uff1f<\/p>\n\n\n\n

\u6ce8\u610f\uff1a\u5982\u679c\u6211\u8981\u6539\u53d8\u6570\u7ec4\u67d0\u4e00\u4e2a\u503c \u76f4\u63a5\u904d\u5386\u7684\u8bdd\u539f\u6570\u7ec4\u662f\u4e0d\u4f1a\u53d8\u7684 \u4e0b\u9762\u63d0\u4f9b\u4e24\u79cd\u65b9\u6cd5<\/p>\n\n\n\n

1.\u6211\u4eec\u53ef\u4ee5\u904d\u5386\u7684\u65f6\u5019\u7ec4\u5408\u6570\u636e\u7136\u540e array_push()\u628a\u6570\u636e\u8d4b\u7ed9\u53e6\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u8fd9\u6837\u624d\u53ef\u4ee5 \u5982\uff1a<\/p>\n\n\n\n

$data=array(1,2,3,4);
$newdata=array();
foreach($data as $k=>$v){
if($v==2) $v=666;\/\/\u6211\u4eec\u60f3\u628a\u503c\u7b49\u4e8e2\u7684\u6539\u4e3a666 \u8fd9\u6837\u7684\u8bdd\u5728\u5185\u90e8\u6539\u53d8\u4e86$v\u4f46\u662f$data\u8fd8\u662f\u6ca1\u6539\u53d8
array_push($newdata,$v);\/\/\u8fd9\u6837\u53ef\u4ee5\u5f97\u5230\u6211\u4eec\u60f3\u8981\u7684\u6570\u7ec4
}<\/p>\n\n\n\n

2.\u6211\u4eec\u53ef\u4ee5\u5728\u904d\u5386\u7684\u503c\u524d\u9762\u52a0\u4e2a&\u7b26\u53f7\u8fd9\u6837\u5c31\u53ef\u4ee5\u6539\u53d8\u539f\u6570\u7ec4\u4e86 \u4e0d\u9700\u8981\u7528array_push()\u4e86<\/p>\n\n\n\n

$data=array(1,2,3,4);
foreach($data as &$v){
if($v==2) $v=666;\/\/\u56e0\u4e3a$v\u524d\u9762\u52a0\u4e86'&'\u6240\u4ee5\u539f\u6570\u7ec4\u5c31\u76f4\u63a5\u6539\u53d8\u4e86
}<\/p>\n\n\n\n

\u5177\u4f53\u7684\u8868\u73b0\u5982\u4e0b\uff1a
'abc',
'b'=>'def',
'd'=>'ghi'
];
$lists = $list;
foreach ($list as $k => &$v){
if ($k == 'a') $v='aaaa';
}
print_r($list);<\/p>\n\n\n\n

foreach ($lists as $k => $v){
if ($k == 'a') $v='abbbbb';
}
print_r($lists);
<\/p>\n\n\n\n

\u8fd0\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n\n\n\n

Array\n(\n    [a] => aaaa\n    [b] => def\n    [d] => ghi\n)\nArray\n(\n    [a] => abc\n    [b] => def\n    [d] => ghi\n)<\/pre>\n","protected":false},"excerpt":{"rendered":"
foreach \u52a0&\u904d\u5386\u7684\u540c\u65f6\u6539\u53d8\u539f\u6570\u7ec4\u5373\u4fee\u6539\u6570\u636e\u6216\u8005\u589e\u52a0\u6570\u636e foreach \u52a0& \u4ec0\u4e48\u610f\u601d […]<\/p>\n","protected":false},"author":1,"featured_media":450,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[45],"_links":{"self":[{"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=\/wp\/v2\/posts\/587"}],"collection":[{"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=587"}],"version-history":[{"count":0,"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=\/wp\/v2\/posts\/587\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=\/wp\/v2\/media\/450"}],"wp:attachment":[{"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=587"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.nywzjs.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}