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附录 P. 解析器代号列表
PHP 语言的不同部分在内部被表示为类似 T_SR 的类型。PHP 在解析错误时输出这样的标识符，例如
"Parse error: unexpected T_SR, expecting ',' or ';' in script.php on line 10."。
你应该知道 T_SR 的含义。对于所有不知道的人，这里有一张表列出了这些标识符，PHP 语法和在手册中适当位置的参考。
表格 P-1. 代号 | 代号 | 语法 | 参考 |
|---|
| T_AND_EQUAL | &= | assignment
operators | | T_ARRAY | array() | array(), array syntax | | T_ARRAY_CAST | (array) | type-casting | | T_AS | as | foreach | | T_BAD_CHARACTER | | anything below ASCII 32 except \t (0x09), \n (0x0a) and \r (0x0d) | | T_BOOLEAN_AND | && | logical operators | | T_BOOLEAN_OR | || | logical operators | | T_BOOL_CAST | (bool) or (boolean) | type-casting | | T_BREAK | break | break | | T_CASE | case | switch | | T_CHARACTER | | | | T_CLASS | class | classes and objects | | T_CLOSE_TAG | ?> or %> | | | T_COMMENT | // or # | comments | | T_CONCAT_EQUAL | .= | assignment
operators | | T_CONST | const | | | T_CONSTANT_ENCAPSED_STRING | "foo" or 'bar' | string syntax | | T_CONTINUE | continue | | | T_CURLY_OPEN | | | | T_DEC | -- | incrementing/decrementing
operators | | T_DECLARE | declare | declare | | T_DEFAULT | default | switch | | T_DIV_EQUAL | /= | assignment
operators | | T_DNUMBER | 0.12, etc | floating point numbers | | T_DO | do | do..while | | T_DOLLAR_OPEN_CURLY_BRACES | ${ | complex
variable parsed syntax | | T_DOUBLE_ARROW | => | array syntax | | T_DOUBLE_CAST | (real), (double) or (float) | type-casting | | T_ECHO | echo | echo() | | T_ELSE | else | else | | T_ELSEIF | elseif | elseif | | T_EMPTY | empty | empty() | | T_ENCAPSED_AND_WHITESPACE | | | | T_ENDDECLARE | enddeclare | declare, alternative syntax | | T_ENDFOR | endfor | for, alternative syntax | | T_ENDFOREACH | endforeach | foreach, alternative syntax | | T_ENDIF | endif | if, alternative syntax | | T_ENDSWITCH | endswitch | switch, alternative syntax | | T_ENDWHILE | endwhile | while, alternative syntax | | T_END_HEREDOC | | heredoc
syntax | | T_EVAL | eval() | eval() | | T_EXIT | exit or die | exit(), die() | | T_EXTENDS | extends | extends, classes and objects | | T_FILE | __FILE__ | constants | | T_FOR | for | for | | T_FOREACH | foreach | foreach | | T_FUNCTION | function or cfunction | functions | | T_GLOBAL | global | variable scope | | T_IF | if | if | | T_INC | ++ | incrementing/decrementing
operators | | T_INCLUDE | include() | include() | | T_INCLUDE_ONCE | include_once() | include_once() | | T_INLINE_HTML | | | | T_INT_CAST | (int) or (integer) | type-casting | | T_ISSET | isset() | isset() | | T_IS_EQUAL | == | comparison operators | | T_IS_GREATER_OR_EQUAL | >= | comparison operators | | T_IS_IDENTICAL | === | comparison operators | | T_IS_NOT_EQUAL | != or <> | comparison operators | | T_IS_NOT_IDENTICAL | !== | comparison operators | | T_SMALLER_OR_EQUAL | <= | comparison operators | | T_LINE | __LINE__ | constants | | T_LIST | list() | list() | | T_LNUMBER | 123, 012, 0x1ac, etc | integers | | T_LOGICAL_AND | and | logical operators | | T_LOGICAL_OR | or | logical operators | | T_LOGICAL_XOR | xor | logical operators | | T_MINUS_EQUAL | -= | assignment
operators | | T_ML_COMMENT | /* and */ | comments | | T_MOD_EQUAL | %= | assignment
operators | | T_MUL_EQUAL | *= | assignment
operators | | T_NEW | new | classes and objects | | T_NUM_STRING | | | | T_OBJECT_CAST | (object) | type-casting | | T_OBJECT_OPERATOR | -> | classes and objects | | T_OLD_FUNCTION | old_function | old_function | | T_OPEN_TAG | <?php, <? or <% | escaping
from HTML | | T_OPEN_TAG_WITH_ECHO | <?= or <%= | escaping
from HTML | | T_OR_EQUAL | |= | assignment
operators | | T_PAAMAYIM_NEKUDOTAYIM | :: | :: | | T_PLUS_EQUAL | += | assignment
operators | | T_PRINT | print() | print() | | T_REQUIRE | require() | require() | | T_REQUIRE_ONCE | require_once() | require_once() | | T_RETURN | return | returning values | | T_SL | << | bitwise
operators | | T_SL_EQUAL | <<= | assignment
operators | | T_SR | >> | bitwise
operators | | T_SR_EQUAL | >>= | assignment
operators | | T_START_HEREDOC | <<< | heredoc
syntax | | T_STATIC | static | variable scope | | T_STRING | | | | T_STRING_CAST | (string) | type-casting | | T_STRING_VARNAME | | | | T_SWITCH | switch | switch | | T_UNSET | unset() | unset() | | T_UNSET_CAST | (unset) | (not documented; casts to NULL) | | T_USE | use | (not implemented) | | T_VAR | var | classes and objects | | T_VARIABLE | $foo | variables | | T_WHILE | while | while, do..while | | T_WHITESPACE | | | | T_XOR_EQUAL | ^= | assignment
operators | | T_FUNC_C | __FUNCTION__ | constants, since
PHP 4.3.0 | | T_CLASS_C | __CLASS__ | constants, since
PHP 4.3.0 |
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