PHP - In "===" what is evaluated first? Either type or value equality?

Question

We have a comparison operator which has a operator '==='. Can someone guide, what is evaluated first, the "type" or the value equality?

Answer 1

Type first

The type check is first. It is not possible to compare variables of different types without first casting them both to the same type.

Answer 2

I think it is the type because ===does equalty without conversion but sometimes values are coded identically like "0" and "false". As 0 !== false I think the first thing tested is type.

According to source code :

ZEND_API int is_identical_function(zval *result, zval *op1, zval *op2 TSRMLS_DC) /* {{{ */
{
  Z_TYPE_P(result) = IS_BOOL;
  if (Z_TYPE_P(op1) != Z_TYPE_P(op2)) {
     Z_LVAL_P(result) = 0;
     return SUCCESS;
  }
  /*then value check*/