collator_is_numeric  363 ext/intl/collator/collator_convert.c 	if( ( is_numeric = collator_is_numeric( (UChar*) Z_STRVAL_P(str), UCHARS( Z_STRLEN_P(str) ), &lval, &dval, 1 ) ) )
collator_is_numeric   24 ext/intl/collator/collator_is_numeric.h zend_uchar collator_is_numeric( UChar *str, int32_t length, zend_long *lval, double *dval, int allow_errors );