PHP[012]:TypeCode

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如何利用php严格模式写出理想的代码

php限定类型 

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function returnIntByBool(bool $param):int
{
    if($param){
        $result = 1;
    } else {
        $result = 2;
    }
    return $result;
}

php严格模式开启 

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declare (strict_types = 1);

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<?php
declare (strict_types = 1);

function returnArr($param) : array
{
    if ($param) {
        return [];
    }
}

try {
    var_dump(returnArr(1));
} catch (\Throwable $e) {
    echo ($e->getMessage());
}

try {
    var_dump(returnArr(0));
} catch (\Throwable $e) {
    echo ($e->getMessage() . PHP_EOL);
}

function returnArrByBoolean(bool $param) : array
{
    if ($param) {
        return [];
    }
}


try {
    var_dump(returnArrByBoolean(1));
} catch (\Throwable $e) {
    echo ($e->getMessage() . PHP_EOL);
}

try {
    var_dump(returnArrByBoolean(true));
} catch (\Throwable $e) {
    echo ($e->getMessage() . PHP_EOL);
}


function returnArrayByBooleanUseFormat(bool $param) : array
{
    $result = [];
    if ($param) {
        $result = ['param' => true];
    }
    return $result;
}

try {
    var_dump(returnArrayByBooleanUseFormat(true));
} catch (\Throwable $e) {
    echo ($e->getMessage() . PHP_EOL);
}


try {
    var_dump(returnArrayByBooleanUseFormat(false));
} catch (\Throwable $e) {
    echo ($e->getMessage() . PHP_EOL);
}