请求刀片视图模板中使用的所有变量的列表

Question

We have a series of blade view templates that are out going emails and would like to create a simple way for our in house administration to preview these emails without actually sending them.

I could keep tract of, and provide filler variables but am very curious if there is a way to request a list of variables used in a view?

For example, I have a basic view "greeting.blade.php" that says:

Dear {{$customerFirstName}} {{$customerLastName}},

I'd like to:

$usedVariablesArray = getVariablesFromView("greeting");

And have it return:

['customerFirstName', 'customerLastName']

Is there anything built into laravel that provides this kind of functionality?

[EDIT] I'd like to do this from outside the view file in question.

public function previewEmailTemplate($templateName) {
    $usedVariables = $getArrayOfVariables($template);
    // Would return ['customerFirstName', 'customerLastName']

    foreach($usedVariables as $aUsedVariable) {
        $dummyValues[$aUsedVariable] = $aUsedVariable;
    }

    return view($template, $dummyValues)->render();
}

So this function would render the template with the variable names in the place of the variables.

Does that make my question clearer?

Answer 1

I also need such function but not find on the net.

I write a simple function to do it.

May help you

greeting.blade.php

Dear {{$customerFirstName}} {{$customerLastName}},

functions.php

function getVariablesFromView($templatePath)
{
    // $templatePath = '/resources/views/mails/greeting.blade.php'
    $contents = file_get_contents($templatePath);

    $re = '/{{[\ ]*\$[a-zA-Z]+[\ ]*}}/m';
    preg_match_all($re, $contents, $matches, PREG_SET_ORDER, 0);
    $flatternArray = [];
    array_walk_recursive($matches, function ($a) use (&$flatternArray) {$flatternArray[] = $a;});
    $variables = str_replace(['{{', '}}', '$', ' '], '', $flatternArray);

    return $variables;
    // ['customerFirstName', 'customerLastName']
}

p.s. this function doesn't support advanced blade syntax such like @extend('xxx')