Fix GH-21162: pg_connect() on error memory leak. #21165
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The PHP_PQ_ERROR macro calls php_error_docref() which triggers user error handlers thus libpq does not have the chance to clean the resources (and empty connections string are allowed) on failure thus we avoid this macro and delay the error handling after.
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The PHP_PQ_ERROR macro calls php_error_docref() which triggers user error handlers thus libpq does not have the chance to clean the resources (and empty connections string are allowed) on failure thus we avoid this macro and delay the error handling after.