PHP Token Constants List

token_constants.php

<?php

$tokenConstants = array_filter(
    get_defined_constants(),
    function ($value, $key) {
        return substr($key, 0, 2) === 'T_';
    },
    ARRAY_FILTER_USE_BOTH
);

echo 'Token                          | Value' . PHP_EOL;
echo '------------------------------ | -----' . PHP_EOL;

foreach ($tokenConstants as $tokenConstant => $value) {
    printf("%-30s | %s\n", $tokenConstant, $value);
}

token_constants_php5.6.8.md

Token	Value
T_FMT	3
T_FMT_AMPM	4
T_REQUIRE_ONCE	258
T_REQUIRE	259
T_EVAL	260
T_INCLUDE_ONCE	261
T_INCLUDE	262
T_LOGICAL_OR	263
T_LOGICAL_XOR	264
T_LOGICAL_AND	265
T_PRINT	266
T_YIELD	267
T_POW_EQUAL	268
T_SR_EQUAL	269
T_SL_EQUAL	270
T_XOR_EQUAL	271
T_OR_EQUAL	272
T_AND_EQUAL	273
T_MOD_EQUAL	274
T_CONCAT_EQUAL	275
T_DIV_EQUAL	276
T_MUL_EQUAL	277
T_MINUS_EQUAL	278
T_PLUS_EQUAL	279
T_BOOLEAN_OR	280
T_BOOLEAN_AND	281
T_IS_NOT_IDENTICAL	282
T_IS_IDENTICAL	283
T_IS_NOT_EQUAL	284
T_IS_EQUAL	285
T_IS_GREATER_OR_EQUAL	286
T_IS_SMALLER_OR_EQUAL	287
T_SR	288
T_SL	289
T_INSTANCEOF	290
T_UNSET_CAST	291
T_BOOL_CAST	292
T_OBJECT_CAST	293
T_ARRAY_CAST	294
T_STRING_CAST	295
T_DOUBLE_CAST	296
T_INT_CAST	297
T_DEC	298
T_INC	299
T_POW	300
T_CLONE	301
T_NEW	302
T_EXIT	303
T_IF	304
T_ELSEIF	305
T_ELSE	306
T_ENDIF	307
T_LNUMBER	308
T_DNUMBER	309
T_STRING	310
T_STRING_VARNAME	311
T_VARIABLE	312
T_NUM_STRING	313
T_INLINE_HTML	314
T_CHARACTER	315
T_BAD_CHARACTER	316
T_ENCAPSED_AND_WHITESPACE	317
T_CONSTANT_ENCAPSED_STRING	318
T_ECHO	319
T_DO	320
T_WHILE	321
T_ENDWHILE	322
T_FOR	323
T_ENDFOR	324
T_FOREACH	325
T_ENDFOREACH	326
T_DECLARE	327
T_ENDDECLARE	328
T_AS	329
T_SWITCH	330
T_ENDSWITCH	331
T_CASE	332
T_DEFAULT	333
T_BREAK	334
T_CONTINUE	335
T_GOTO	336
T_FUNCTION	337
T_CONST	338
T_RETURN	339
T_TRY	340
T_CATCH	341
T_FINALLY	342
T_THROW	343
T_USE	344
T_INSTEADOF	345
T_GLOBAL	346
T_PUBLIC	347
T_PROTECTED	348
T_PRIVATE	349
T_FINAL	350
T_ABSTRACT	351
T_STATIC	352
T_VAR	353
T_UNSET	354
T_ISSET	355
T_EMPTY	356
T_HALT_COMPILER	357
T_CLASS	358
T_TRAIT	359
T_INTERFACE	360
T_EXTENDS	361
T_IMPLEMENTS	362
T_OBJECT_OPERATOR	363
T_DOUBLE_ARROW	364
T_LIST	365
T_ARRAY	366
T_CALLABLE	367
T_CLASS_C	368
T_TRAIT_C	369
T_METHOD_C	370
T_FUNC_C	371
T_LINE	372
T_FILE	373
T_COMMENT	374
T_DOC_COMMENT	375
T_OPEN_TAG	376
T_OPEN_TAG_WITH_ECHO	377
T_CLOSE_TAG	378
T_WHITESPACE	379
T_START_HEREDOC	380
T_END_HEREDOC	381
T_DOLLAR_OPEN_CURLY_BRACES	382
T_CURLY_OPEN	383
T_PAAMAYIM_NEKUDOTAYIM	384
T_NAMESPACE	385
T_NS_C	386
T_DIR	387
T_NS_SEPARATOR	388
T_ELLIPSIS	389
T_DOUBLE_COLON	384

Note that the numbers change from one version to the other:

https://3v4l.org/2d6up

So do rely on constants and not values.

Thanks for the info @BenMorel!