Forgotten technology-GOTO statement in PHP

Source: Internet
Author: User

(Like 04 years) in July 29, Sara released a goto declaration patch (adding a GOTO statement to PhP) in the newsgroup, which immediately caused a strong sensation in the newsgroup, just like Goto in C, there are both advantages and disadvantages.

Example:

function x ($a, $b) {
     if ($b > 0) {
          return x ($a + 1, $b - 1);
     } else {
          return $a;
     }
}

Use goto to replace the above recursive example:

function x ($a, $b) {
loop:
     if ($b <= 0) {
          return $a;
     } else {
          $b -= 1;
          $a += 1;
          goto loop;
     }
}
 

Related links:

Newsgroup discussion: goto Operator

Http://pecl.org

Patch download: http://pecl.org/patches/opcode_goto_5.1.0.diff

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