将PHP字符串中两个字符之间的数字相乘

时间：2020-05-02 07:03:26

标签： php json regex parsing

请最后查看EDIT。

我正在从外部URL解析无效的json数据，并且想要修改特定键的值。 我想将一个特定键（分）的值乘以一个常数。

如果仔细观察，该模式会重复，它以“ vk”开头。

如何将“ cent”的值乘以常数（0.887）。

我要从外部URL解析的示例数据如下所示：

create table Classes( Class varchar(20), type char(20), country varchar(20), numGuns int, bore int, displacement int, primary key(Class)); create table Ships( name varchar(20), Class varchar(20), launched int, primary key(name), foreign key(Class) references Classes (Class)); create table Outcomes( ship varchar(20), battle varchar(20), result varchar(10), foreign key(battle) references Battles(Name), foreign key(ship) references Ships(name)); insert into Classes values ('Bismark', 'bb', 'Germany', 8, 15, 42000), ('Iowa', 'bb', 'USA', 9, 16, 46000), ('Kongo', 'bc', 'Japan', 8, 14, 32000), ('North Carolina', 'bb', 'USA', 9, 16, 37000), ('Renown', 'bc', 'Gt. Britain', 6, 15, 32000), ('Revenge', 'bb', 'Gt. Britain', 8,15, 29000), ('Tennessee', 'bb', 'USA', 12, 14, 32000), ('Yamato', 'bb', 'Japan', 9, 18, 65000); insert into Ships values ('Prince of Wales', 'Tennessee', 1921), ('Bismark', 'Bismark', 1915), ('Duke of York', 'Kongo', 1914), ('Iowa', 'Iowa', 1943), ('Kirishima', 'Kongo', 1915), ('Kongo', 'Kongo', 1913), ('Fuso', 'Iowa', 1943), ('Yamashiro', 'Yamato', 1942), ('California', 'Iowa', 1943), ('North Carolina', 'North Carolina', 1941), ('Renown', 'Renown', 1916), ('Hood', 'Renown', 1916), ('Scharnhorst', 'Revenge', 1916), ('Revenge', 'Revenge', 1916), ('King George V', 'Revenge', 1916), ('South Dakota', 'Revenge', 1916), ('Tennessee', 'Tennessee', 1920), ('Washington', 'North Carolina', 1941), ('West Virginia', 'Iowa', 1943), ('Yamato', 'Yamato', 1941); insert into Outcomes values ('Bismark', 'North Atlantic', 'sunk'), ('California', 'Surigao Strait', 'ok'), ('Duke of York', 'North Cape', 'ok'), ('Duke of York', 'Surigao Strait', 'ok'), ('Fuso', 'Surigao Strait', 'sunk'), ('Hood', 'North Atlantic', 'sunk'), ('King George V', 'North Atlantic', 'ok'), ('Kirishima', 'Guadalcanal', 'sunk'), ('Prince of Wales', 'North Atlantic', 'damaged'), ('Prince of Wales', 'North Cape', 'ok'), ('Scharnhorst', 'North Cape', 'sunk'), ('South Dakota', 'Guadalcanal', 'damaged'), ('Tennessee', 'Surigao Strait', 'sunk'), ('Washington', 'Guadalcanal', 'ok'), ('West Virginia', 'Surigao Strait', 'ok'), ('Yamashiro', 'Surigao Strait', 'ok');

我尝试的代码：

{"0":{"vk":{"cent":21,"bank":1453},"ok":{"cent":4,"bank":2581},"wa":{"cent":4.5,"bank":959},"vi":{"cent":4,"bank":0},"tg":{"cent":4.5,"bank":0},"wb":{"cent":14,"bank":6733},"go":{"cent":5.5,"bank":149},"av":{"cent":2.5,"bank":2139},"av_1":{"cent":59,"bank":0},"fb":{"cent":3,"bank":84},"tw":{"cent":2,"bank":3848},"ot_1":{"cent":59,"bank":0},"ub":{"cent":1,"bank":4042},"gt":{"cent":1,"bank":6835},"ig":{"cent":5,"bank":3094},"ym":{"cent":2,"bank":16},"ym_1":{"cent":59,"bank":0},"ma":{"cent":1,"bank":5282},"mm":{"cent":2,"bank":0},"uk":{"cent":2,"bank":7097},"mb":{"cent":2.5,"bank":2694},"we":{"cent":1,"bank":7010},"bd":{"cent":13,"bank":0},"dt":{"cent":2,"bank":5592},"ya":{"cent":2,"bank":3811},"ya_1":{"cent":59,"bank":0},"mt":{"cent":4,"bank":6468},"oi":{"cent":1.25,"bank":1200},"fd":{"cent":1,"bank":5505},"zz":{"cent":2,"bank":7097},"kt":{"cent":1.5,"bank":6585},"pm":{"cent":1.5,"bank":983},"tn":{"cent":1,"bank":7112},"qq":{"cent":2,"bank":5796},"mg":{"cent":1,"bank":2260},"yl":{"cent":1,"bank":5950},"po":{"cent":2,"bank":5645},"nv":{"cent":2,"bank":3378},"nf":{"cent":2,"bank":6210},"im":{"cent":1.5,"bank":217},"ds":{"cent":1.25,"bank":5796},"vv":{"cent":1,"bank":6685},"lf":{"cent":1.5,"bank":6582},"gp":{"cent":1.5,"bank":6682},"am":{"cent":1,"bank":6674},"tc":{"cent":1,"bank":6683},"dp":{"cent":1,"bank":6324},"yf":{"cent":2,"bank":6587},"op":{"cent":2,"bank":6331},"fx":{"cent":2,"bank":6525},"qr":{"cent":2,"bank":6664},"yk":{"cent":2,"bank":6650},"ls":{"cent":2,"bank":6668},"bl":{"cent":2,"bank":6025},"mu":{"cent":2,"bank":6627},"fu":{"cent":2,"bank":6666},"sg":{"cent":2,"bank":6387},"uu":{"cent":2,"bank":6678},"ua":{"cent":2,"bank":6357},"ab":{"cent":2,"bank":6127},"iv":{"cent":2,"bank":6685},"fy":{"cent":2,"bank":6351},"ce":{"cent":2,"bank":6279},"hm":{"cent":2,"bank":6317},"tx":{"cent":2,"bank":6669},"pl":{"cent":2,"bank":6682},"ip":{"cent":2,"bank":6314},"hw":{"cent":2,"bank":6085},"de":{"cent":1,"bank":6548},"jc":{"cent":2,"bank":6683},"rl":{"cent":2,"bank":6594},"df":{"cent":2,"bank":6353},"ui":{"cent":1.5,"bank":6633},"up":{"cent":2,"bank":6670},"kf":{"cent":1,"bank":6685},"za":{"cent":2,"bank":6683},"da":{"cent":3,"bank":5469},"sq":{"cent":2,"bank":6685},"li":{"cent":2,"bank":6486},"rd":{"cent":2,"bank":6650},"qb":{"cent":2,"bank":6685},"hz":{"cent":2,"bank":6684},"ia":{"cent":2,"bank":6685},"ew":{"cent":1.5,"bank":6681},"ae":{"cent":1,"bank":6654},"gb":{"cent":1,"bank":6681},"cy":{"cent":3,"bank":5642},"qm":{"cent":2.5,"bank":6684},"yb":{"cent":2.5,"bank":6761},"ot":{"cent":2.5,"bank":0}}}{"1":{"vk":{"cent":21,"bank":6},"ok":{"cent":5,"bank":1594},"wa":{"cent":8,"bank":0},"vi":{"cent":7,"bank":3},"tg":{"cent":8,"bank":0},"wb":{"cent":15,"bank":952},"go":{"cent":10,"bank":2},"av":{"cent":4,"bank":1517},"fb":{"cent":3.5,"bank":3},"tw":{"cent":2,"bank":453},"ub":{"cent":2,"bank":610},"gt":{"cent":1,"bank":1511},"sn":{"cent":40,"bank":693},"ig":{"cent":6,"bank":0},"ss":{"cent":1,"bank":1516},"ym":{"cent":2,"bank":1434},"ma":{"cent":1,"bank":1140},"mm":{"cent":2,"bank":0},"uk":{"cent":2,"bank":1447},"me":{"cent":1,"bank":1516},"mb":{"cent":2.5,"bank":262},"we":{"cent":1,"bank":1517},"bd":{"cent":1,"bank":1509},"kp":{"cent":2,"bank":1466},"dt":{"cent":1,"bank":1515},"ya":{"cent":1,"bank":558},"mt":{"cent":4,"bank":1923},"oi":{"cent":2,"bank":474},"fd":{"cent":2,"bank":1448},"zz":{"cent":2,"bank":1509},"kt":{"cent":2,"bank":580},"pm":{"cent":1.5,"bank":1},"tn":{"cent":1,"bank":1499},"qq":{"cent":2,"bank":1022},"yl":{"cent":1,"bank":1459},"po":{"cent":6,"bank":1478},"nv":{"cent":6,"bank":611},"nf":{"cent":6,"bank":1334},"im":{"cent":2,"bank":188},"ds":{"cent":1.5,"bank":187},"vv":{"cent":2,"bank":1453},"ji":{"cent":2,"bank":998},"lf":{"cent":2,"bank":1470},"hu":{"cent":6,"bank":854},"wg":{"cent":4,"bank":991},"rz":{"cent":2,"bank":1408},"la":{"cent":6,"bank":1477},"zh":{"cent":1,"bank":1430},"gp":{"cent":1.5,"bank":1458},"ls":{"cent":6,"bank":1478},"zy":{"cent":6,"bank":1476},"tx":{"cent":6,"bank":1260},"cm":{"cent":6,"bank":1384},"hw":{"cent":6,"bank":853},"ri":{"cent":9,"bank":1476},"za":{"cent":2,"bank":1453},"gl":{"cent":3,"bank":1366},"dh":{"cent":4,"bank":1409},"ot":{"cent":6,"bank":519}}}

编辑：我认为它不是json，可以使用正则表达式解决。我正在考虑找到：和 之间的字符串，以及如何将此数字与我的常数相乘。

感谢您的帮助。我不是网络开发人员，但是我有一个小项目，我想自己解决这个问题，而不是雇用别人。

谢谢。

1 个答案:

答案 0 :(得分：2)

<?php
$json = '{"0":{"vk":{"cent":21,"bank":1453},"ok":{"cent":4,"bank":2581},"wa":{"cent":4.5,"bank":959},"vi":{"cent":4,"bank":0},"tg":{"cent":4.5,"bank":0},"wb":{"cent":14,"bank":6733},"go":{"cent":5.5,"bank":149},"av":{"cent":2.5,"bank":2139},"av_1":{"cent":59,"bank":0},"fb":{"cent":3,"bank":84},"tw":{"cent":2,"bank":3848},"ot_1":{"cent":59,"bank":0},"ub":{"cent":1,"bank":4042},"gt":{"cent":1,"bank":6835},"ig":{"cent":5,"bank":3094},"ym":{"cent":2,"bank":16},"ym_1":{"cent":59,"bank":0},"ma":{"cent":1,"bank":5282},"mm":{"cent":2,"bank":0},"uk":{"cent":2,"bank":7097},"mb":{"cent":2.5,"bank":2694},"we":{"cent":1,"bank":7010},"bd":{"cent":13,"bank":0},"dt":{"cent":2,"bank":5592},"ya":{"cent":2,"bank":3811},"ya_1":{"cent":59,"bank":0},"mt":{"cent":4,"bank":6468},"oi":{"cent":1.25,"bank":1200},"fd":{"cent":1,"bank":5505},"zz":{"cent":2,"bank":7097},"kt":{"cent":1.5,"bank":6585},"pm":{"cent":1.5,"bank":983},"tn":{"cent":1,"bank":7112},"qq":{"cent":2,"bank":5796},"mg":{"cent":1,"bank":2260},"yl":{"cent":1,"bank":5950},"po":{"cent":2,"bank":5645},"nv":{"cent":2,"bank":3378},"nf":{"cent":2,"bank":6210},"im":{"cent":1.5,"bank":217},"ds":{"cent":1.25,"bank":5796},"vv":{"cent":1,"bank":6685},"lf":{"cent":1.5,"bank":6582},"gp":{"cent":1.5,"bank":6682},"am":{"cent":1,"bank":6674},"tc":{"cent":1,"bank":6683},"dp":{"cent":1,"bank":6324},"yf":{"cent":2,"bank":6587},"op":{"cent":2,"bank":6331},"fx":{"cent":2,"bank":6525},"qr":{"cent":2,"bank":6664},"yk":{"cent":2,"bank":6650},"ls":{"cent":2,"bank":6668},"bl":{"cent":2,"bank":6025},"mu":{"cent":2,"bank":6627},"fu":{"cent":2,"bank":6666},"sg":{"cent":2,"bank":6387},"uu":{"cent":2,"bank":6678},"ua":{"cent":2,"bank":6357},"ab":{"cent":2,"bank":6127},"iv":{"cent":2,"bank":6685},"fy":{"cent":2,"bank":6351},"ce":{"cent":2,"bank":6279},"hm":{"cent":2,"bank":6317},"tx":{"cent":2,"bank":6669},"pl":{"cent":2,"bank":6682},"ip":{"cent":2,"bank":6314},"hw":{"cent":2,"bank":6085},"de":{"cent":1,"bank":6548},"jc":{"cent":2,"bank":6683},"rl":{"cent":2,"bank":6594},"df":{"cent":2,"bank":6353},"ui":{"cent":1.5,"bank":6633},"up":{"cent":2,"bank":6670},"kf":{"cent":1,"bank":6685},"za":{"cent":2,"bank":6683},"da":{"cent":3,"bank":5469},"sq":{"cent":2,"bank":6685},"li":{"cent":2,"bank":6486},"rd":{"cent":2,"bank":6650},"qb":{"cent":2,"bank":6685},"hz":{"cent":2,"bank":6684},"ia":{"cent":2,"bank":6685},"ew":{"cent":1.5,"bank":6681},"ae":{"cent":1,"bank":6654},"gb":{"cent":1,"bank":6681},"cy":{"cent":3,"bank":5642},"qm":{"cent":2.5,"bank":6684},"yb":{"cent":2.5,"bank":6761},"ot":{"cent":2.5,"bank":0}}}{"1":{"vk":{"cent":21,"bank":6},"ok":{"cent":5,"bank":1594},"wa":{"cent":8,"bank":0},"vi":{"cent":7,"bank":3},"tg":{"cent":8,"bank":0},"wb":{"cent":15,"bank":952},"go":{"cent":10,"bank":2},"av":{"cent":4,"bank":1517},"fb":{"cent":3.5,"bank":3},"tw":{"cent":2,"bank":453},"ub":{"cent":2,"bank":610},"gt":{"cent":1,"bank":1511},"sn":{"cent":40,"bank":693},"ig":{"cent":6,"bank":0},"ss":{"cent":1,"bank":1516},"ym":{"cent":2,"bank":1434},"ma":{"cent":1,"bank":1140},"mm":{"cent":2,"bank":0},"uk":{"cent":2,"bank":1447},"me":{"cent":1,"bank":1516},"mb":{"cent":2.5,"bank":262},"we":{"cent":1,"bank":1517},"bd":{"cent":1,"bank":1509},"kp":{"cent":2,"bank":1466},"dt":{"cent":1,"bank":1515},"ya":{"cent":1,"bank":558},"mt":{"cent":4,"bank":1923},"oi":{"cent":2,"bank":474},"fd":{"cent":2,"bank":1448},"zz":{"cent":2,"bank":1509},"kt":{"cent":2,"bank":580},"pm":{"cent":1.5,"bank":1},"tn":{"cent":1,"bank":1499},"qq":{"cent":2,"bank":1022},"yl":{"cent":1,"bank":1459},"po":{"cent":6,"bank":1478},"nv":{"cent":6,"bank":611},"nf":{"cent":6,"bank":1334},"im":{"cent":2,"bank":188},"ds":{"cent":1.5,"bank":187},"vv":{"cent":2,"bank":1453},"ji":{"cent":2,"bank":998},"lf":{"cent":2,"bank":1470},"hu":{"cent":6,"bank":854},"wg":{"cent":4,"bank":991},"rz":{"cent":2,"bank":1408},"la":{"cent":6,"bank":1477},"zh":{"cent":1,"bank":1430},"gp":{"cent":1.5,"bank":1458},"ls":{"cent":6,"bank":1478},"zy":{"cent":6,"bank":1476},"tx":{"cent":6,"bank":1260},"cm":{"cent":6,"bank":1384},"hw":{"cent":6,"bank":853},"ri":{"cent":9,"bank":1476},"za":{"cent":2,"bank":1453},"gl":{"cent":3,"bank":1366},"dh":{"cent":4,"bank":1409},"ot":{"cent":6,"bank":519}}}';

//JSON supplied is not valid, it misses [] at the beginning and the end
//and it also misses a comma between the keys which is solved by next two lines
$json = str_replace("}{","},{", $json);
$valid_json = '[' . $json . ']';

$data = json_decode($valid_json, true); 

//Copy the current data into new array $na
$na = array_slice($data,0,count($data));

//Change the copy of array $data with cents
foreach($data as $top_key=>$value) {
    $level_arr = $na[$top_key][$top_key];    
    foreach($level_arr as $key=>$item) {
        if ($na[$top_key][$top_key][$key]['cent']>0) {
            $na[$top_key][$top_key][$key]['cent'] = $data[$top_key][$top_key][$key]['cent'] * 0.087;
        }
    }
}

//JSON
echo json_encode($na);

UPDATE1：

您可以删除if ($na[$top_key][$top_key][$key]['cent']>0) {-部分。

//Change the copy of array $data with cents
foreach($data as $top_key=>$value) {
    $level_arr = $na[$top_key][$top_key];    
    foreach($level_arr as $key=>$item) {
            $na[$top_key][$top_key][$key]['cent'] = $data[$top_key][$top_key][$key]['cent'] * 0.087; 
    }
}

//JSON
echo json_encode($na);

UPDATE2：

以上要求数组的级别为：

[0][0][{whatever key}]['cent]
[1][1][{whatever key}]['cent]
[2][2][{whatever key}]['cent]

如果您希望不被遗忘而具有更大的灵活性，那么顶级密钥和第二级密钥是相同的（[0][0], [1][1]等...）

您可以执行以下操作：（替换上面给出的代码）

//Change the copy of array $data with cents
foreach($data as $top_key=>$second_level) {
    foreach($second_level as $key2=>$value) {
        $level_arr = $na[$top_key][$key2];    
        foreach($level_arr as $key=>$item) {
                $na[$top_key][$key2][$key]['cent'] = (float)$data[$top_key][$key2][$key]['cent'] * 0.087;
        }
    }
}

UPDATE3：

我错过了在update2中将$top_key更改为$key2的问题（现在我将其更正为），但这几乎是相同的代码，但结果是基于实际数据的两个小数（从外部API），而费用则是关键而不是分钱。我还将实际内容更改为0.877，而不是0.087。

foreach($data as $top_key=>$second_level) {
    foreach($second_level as $key2=>$level_arr) { 
        foreach($level_arr as $key=>$item) {
            $na[$top_key][$key2][$key]['cost'] = 
            number_format(
            (float)$data[$top_key][$key2][$key]['cost'] * 0.877,2
            );
        }
    }
}
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