About the problem with the operator. For hair like this

Questions about operators. For hair like this?

PHP Code

  
  if ($item [$column _name]. $operation $info)        {            echo $item [$column _name]. $operation. $info; Echo ' =====true '; Echo '
';            return true;        } else{            echo $item [$column _name]. $operation $info; Echo ' =====false '; Echo '
';            return false;        } Output: 508205462=505765854=====true10>1234567=====true20<66666=====true interpretation: The result of $item [$column _name] is equivalent to the first of the operators, $operation is the operator, $info is the value, why the direct write if (10>1234567) return false, the program operation out all true??

------Solution--------------------
Because there are ".", so your variables as strings are connected together
If you want them to be an expression operation, you need the Eval function

Eval (' return '. $item [$column _name]. $operation. $info. ';')

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