[PHP-DEV] ZEND_ADD_STRING patch

[George Schlossnagle]

For those who came to Dan & my or Derick's talk at the Int. PHP Conference, we both covered the bad inefficiency in the parser that results in strings with variables in them being tokenized on whitespace. This results in a huge number of unnecessary opcodes in strings.

Attached (hopefully, as my new MUA seems to be fickle) is a first shot at a fix to the parser to keep this from happening, so that you don't need an optimizer to clear up this issue. I've tested this locally. It still introduces a single unnecessary opcode after variable in certain cases, but it works for me.

George

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