php parsing comma separated list of var=value pairs - php

Question

I'm receiving a string
a=100,b=20,c=20;
for instance I know exploding this into an array using , as delimiter,
and it becomes
a=100
b=20
c=20
as strings,
how can this be further evaluated as variables inside php so I could do
echo $a //100
echo $b //20
echo $c //20

Answer 1

try the function "parse_str"，like
$str = str_replace(','，'&',"a=100,b=10,c=20");
parse_str($str);
echo $a;
echo $b;
echo $c;

Answer 2

$string = 'a=1,b=20,c=43';
foreach ( explode(',', $string) as $expression ) {
list($variable,$value) = explode('=', $expression);
$$variable = $value;
}
echo 'a = ', $a, ' and b = ', $b, ' and c = ', $c, PHP_EOL;
Cheers

Answer 3

Depends how "dangerous" you want everything to be - you can always use eval but then there are many issues to take into consideration.
Example:
eval("\$str = \"test\";");
echo $str;

Answer 4

Try This
$input = 'a=100,b=20,c=20';
$items = explode(',',$input);
foreach($items as $i){
$pair = explode('=',$i);
$$pair[0] = $pair[1];
}

Answer 5

$input = 'a=100,b=20,c=20';
$statements = explode (',', $input);
foreach ($statements as $s)
eval ('$' . $s); // THIS IS EVIL!!!! TOO MANY SECURITY PROBLEMS
echo $a; // will output 100
echo $b; // will output 20
echo $c; // will output 20

Answer 6

You can use variable names for variables. Take for example:
$var = 'var2';
$$var = 5;
echo $var2;
this echoes 5 to the command line.
$var evaluates to being var2, and $var2 is set to 5.
Taking your code we can create this:
$string = 'a=100,b=20,c=20';
$array = explode(',',$string);
foreach($array as $element) {
$temp = explode('=',$element);
$$temp[0] = $temp1;
}
echo $a.' '.$b.' '.$c;
This echoes the string '100 20 20'.