PHP 5.2和5.4 / Arrays之间的差异[关闭]

Question

I have following code:

  Line 27:  while($tab[array_keys($tab)[$a]] > 0)

It works on PHP 5.4 but doesn't work on 5.2. I'm getting this error code:

Parse error: syntax error, unexpected '[', expecting ']' in path/to/script on line 27

Process finished with exit code 255 at 14:39:03.

What should I do ?

I have no idea :(

SOLVED Solution below

Answer 1

Array dereferencing was made available in PHP 5.4. So you will need an extra step to get your value:

Change:

while($tab[array_keys($tab)[$a]] > 0)

to

$var = array_keys($tab);
while($tab[$var[$a]] > 0) {