PHP: simple instance _ php instance for determining whether the brackets in the expression match

The following small series will bring you a simple example of PHP to determine whether the brackets in the expression match. I think this is quite good. now I will share it with you and give you a reference. Let's take a look at it with Xiaobian. As follows:

<? Php/*** title: determines whether the brackets in the expression match * Description) (mismatched use of the pressure stack and the Out Stack * @ author Mr Lv */function isValid ($ expstr) {$ temp = array (); for ($ I = 0; $ I

 
  
  "; echo isValid($expstrB); echo "
  
  
"; echo isValid($expstrC); ?> 
 
 

Page Information:

The right parenthesis is missing (

The above is all the simple examples provided by the small Editor for you to determine whether the brackets in the expression match. I hope you can support more scripts ~