如何找到字符串变量并与数组进行比较？

Question

我有这个数组：

Array
(
[0] => 
bool own = 0
[1] => 
bool contr_name = 0
[2] => 
int all_votes = 0
[3] => 
bool contract_start = 0
[4] => 
bool contract_end = 0
[11] => 
clock T
[12] =>   
int a 
[13] => 
int candi_ID = 1
[14] => 
int voter_ID = 1
[15] => 

)

首先我想保存数据类型、变量名和值。 其次，我想比较一个变量，就像我在数组中是否有这个变量，然后找到它是否相等的值。 这是我的代码：

$variable = "own=1";

function searchTheValue($afterExp,$variable){
    $datatype ="";
    $variablename ="";
    $equalto ="";
    $varaiablevalue ="";
    foreach ($afterExp as $newtest){

        $afterExpBySpace = explode(" ",$newtest);
        if (isset($afterExpBySpace[0])){
            $datatype = !empty($afterExpBySpace[0]) ? $afterExpBySpace[0] : "";
        }
        if (isset($afterExpBySpace[1])){
            $variablename = !empty($afterExpBySpace[1]) ? $afterExpBySpace[1] : "";
        }
        if (isset($afterExpBySpace[2])){
            $equalto = !empty($afterExpBySpace[2]) ? $afterExpBySpace[2] : "";
        }
        if (isset($afterExpBySpace[2])){
            if (!empty($afterExpBySpace[3])){
                $varaiablevalue = $afterExpBySpace[3];

            }else{
                if($afterExpBySpace[3] == "0"){
                    $varaiablevalue = "0";
                }
            }
        }
        echo $datatype."datatype<br>" ;
        echo $variablename."variable name<br>" ;
        echo $equalto." = <br>";
        echo $varaiablevalue." variable value";exit;
    }

}

searchTheValue($afterExp,$variable);

所以，这里我有 $variable="own=1";。 我想在数组中搜索变量名是否存在于数组中的变量，并比较它是否等于 1 的值。 任何建议将不胜感激。

Answer 1

就像你拥有的更干净的版本一样，还添加了检查你正在寻找的变量的部分。

此代码首先处理值数组，这意味着这些值可以反复使用（更新等）而无需多次转换它们，然后searchTheValue()函数只查找您传入的值（注释中为清楚起见的代码）...

$afterExp = ["bool own = 0","bool contr_name = 0",
    "int all_votes = 0","bool contract_start = 0",
    "bool contract_end = 0","clock T","int a",
    "int candi_ID = 1","int voter_ID = 1",""];

$variables = [];
foreach ($afterExp as $variable){
    if ( !empty($variable) )    {
        // Split type and name from value
        $splitEquals = explode("=", $variable);
        // Split type and name
        $nameAndType = explode(" ", $splitEquals[0]);
        if ( count($nameAndType) > 1)  {
            // Set variables with name, type and value (defaulter to null if not set)
            $variables[ trim($nameAndType[1])] = ["type" => trim($nameAndType[0]),
                "value" => isset($splitEquals[1]) ? trim($splitEquals[1]): NULL
            ];
        }
    }
}
$variable = "own=0";
echo searchTheValue($variables,$variable);

function searchTheValue($variables,$variable) {
    // Split variable looking for into name and value
    $var = explode("=", $variable);
    $match = false;
    // If this variable is set
    if ( isset($variables [trim($var[0])]) )  {
        // Compare value with stored value
        if ( $variables [trim($var[0])]['value'] == trim($var[1]) ) {
            $match = true;
        }
    }
    // Note that if the variables isn't found, it will also just return false
    return $match;

}

只是为了显示$variables数据（部分）......

Array
(
    [own] => Array
        (
            [type] => bool
            [value] => 0
        )

    [contr_name] => Array
        (
            [type] => bool
            [value] => 0
        )

    [all_votes] => Array
        (
            [type] => int
            [value] => 0
        )