可以在parse_ini_file配置文件中使用数学吗？

Question

Can math be used in a parse_ini_file configuration file? If not, is there a recommended workaround?

$ini = parse_ini_file("config.ini");

config.ini

MAX_FILE_SIZE  =   100*pow(2,20)   ;100 MB

Answer 1

I've found a workaround for this!

$a = parse_ini_file('a.ini', false, INI_SCANNER_RAW); 

From PHP doc:

If INI_SCANNER_RAW is supplied, then option values will not be parsed.

So, you can collect the whole array, and then create a foreach loop, and use eval on the values.

Check my code: (knowing bug that not remove the eval_next_line, but now i got to go. Monday i will fix that. Till that, you can fix also if you have time for it. Anyway, the round is happens. Yes, the error is that, i have the eval_next_line key twice, so i need to fix that. Anyway, monday.)

define('EVAL_NEXT_LINE', 'eval_next_line');

//Default removing the eval_next_lines
$removeEvals = true;
$options = parse_ini_file('a.ini', false, INI_SCANNER_RAW);
if (array_key_exists("remove_evals", $options)) {
    if (empty($options['remove_evals']) || strtolower($options['remove_evals']) == 'no') {
        $removeEvals = false;
    }
}

$i = 0;
$evalNextLine = false;
foreach ($options as $key => $value) {
    if ($evalNextLine === true) {
        $options[$key] = eval("return " . $value .";");
        $evalNextLine = false;
    }
    if ($key == EVAL_NEXT_LINE && ($value || strtolower($options[EVAL_NEXT_LINE] = 'yes'))) {
        $evalNextLine = true;
        if ($removeEvals) {
            unset($options[$i]);
            //$i--;
        }
    }
    $i++;
}

var_dump($options);

My a.ini is:

[Parse options]
remove_evals = 1;


[Somethings]
eval_next_line = true;
myvar = round(2.5);

abc = xyz;

eval_next_line = true;
myvar2 = 100*pow(2,20);

[Somthing others]
anythig = true;