Here is a list of all variables with links to the files they belong to:

- u -

u : cdf.c
u16 : endianness.h
u8 : endianness.h
U_AMBIGUOUS_ALIAS_WARNING : common.stub.php
U_BAD_VARIABLE_DEFINITION : common.stub.php
U_BRK_ASSIGN_ERROR : common.stub.php
U_BRK_ERROR_LIMIT : common.stub.php
U_BRK_ERROR_START : common.stub.php
U_BRK_HEX_DIGITS_EXPECTED : common.stub.php
U_BRK_INIT_ERROR : common.stub.php
U_BRK_INTERNAL_ERROR : common.stub.php
U_BRK_MALFORMED_RULE_TAG : common.stub.php
U_BRK_MISMATCHED_PAREN : common.stub.php
U_BRK_NEW_LINE_IN_QUOTED_STRING : common.stub.php
U_BRK_RULE_EMPTY_SET : common.stub.php
U_BRK_RULE_SYNTAX : common.stub.php
U_BRK_SEMICOLON_EXPECTED : common.stub.php
U_BRK_UNCLOSED_SET : common.stub.php
U_BRK_UNDEFINED_VARIABLE : common.stub.php
U_BRK_UNRECOGNIZED_OPTION : common.stub.php
U_BRK_VARIABLE_REDFINITION : common.stub.php
U_BUFFER_OVERFLOW_ERROR : common.stub.php
U_CE_NOT_FOUND_ERROR : common.stub.php
U_COLLATOR_VERSION_MISMATCH : common.stub.php
U_DIFFERENT_UCA_VERSION : common.stub.php
U_ENUM_OUT_OF_SYNC_ERROR : common.stub.php
U_ERROR_LIMIT : common.stub.php
U_ERROR_WARNING_LIMIT : common.stub.php
U_ERROR_WARNING_START : common.stub.php
U_FILE_ACCESS_ERROR : common.stub.php
U_FMT_PARSE_ERROR_LIMIT : common.stub.php
U_FMT_PARSE_ERROR_START : common.stub.php
U_IDNA_ACE_PREFIX_ERROR : common.stub.php
U_IDNA_CHECK_BIDI_ERROR : common.stub.php
U_IDNA_DOMAIN_NAME_TOO_LONG_ERROR : common.stub.php
U_IDNA_ERROR_LIMIT : common.stub.php
U_IDNA_ERROR_START : common.stub.php
U_IDNA_LABEL_TOO_LONG_ERROR : common.stub.php
U_IDNA_PROHIBITED_ERROR : common.stub.php
U_IDNA_STD3_ASCII_RULES_ERROR : common.stub.php
U_IDNA_UNASSIGNED_ERROR : common.stub.php
U_IDNA_VERIFICATION_ERROR : common.stub.php
U_IDNA_ZERO_LENGTH_LABEL_ERROR : common.stub.php
U_ILLEGAL_ARGUMENT_ERROR : common.stub.php
U_ILLEGAL_CHAR_FOUND : common.stub.php
U_ILLEGAL_CHAR_IN_SEGMENT : common.stub.php
U_ILLEGAL_CHARACTER : common.stub.php
U_ILLEGAL_ESCAPE_SEQUENCE : common.stub.php
U_ILLEGAL_PAD_POSITION : common.stub.php
U_INDEX_OUTOFBOUNDS_ERROR : common.stub.php
U_INTERNAL_PROGRAM_ERROR : common.stub.php
U_INTERNAL_TRANSLITERATOR_ERROR : common.stub.php
U_INVALID_CHAR_FOUND : common.stub.php
U_INVALID_FORMAT_ERROR : common.stub.php
U_INVALID_FUNCTION : common.stub.php
U_INVALID_ID : common.stub.php
U_INVALID_PROPERTY_PATTERN : common.stub.php
U_INVALID_RBT_SYNTAX : common.stub.php
U_INVALID_STATE_ERROR : common.stub.php
U_INVALID_TABLE_FILE : common.stub.php
U_INVALID_TABLE_FORMAT : common.stub.php
U_INVARIANT_CONVERSION_ERROR : common.stub.php
U_MALFORMED_EXPONENTIAL_PATTERN : common.stub.php
U_MALFORMED_PRAGMA : common.stub.php
U_MALFORMED_RULE : common.stub.php
U_MALFORMED_SET : common.stub.php
U_MALFORMED_SYMBOL_REFERENCE : common.stub.php
U_MALFORMED_UNICODE_ESCAPE : common.stub.php
U_MALFORMED_VARIABLE_DEFINITION : common.stub.php
U_MALFORMED_VARIABLE_REFERENCE : common.stub.php
U_MEMORY_ALLOCATION_ERROR : common.stub.php
U_MESSAGE_PARSE_ERROR : common.stub.php
U_MISMATCHED_SEGMENT_DELIMITERS : common.stub.php
U_MISPLACED_ANCHOR_START : common.stub.php
U_MISPLACED_COMPOUND_FILTER : common.stub.php
U_MISPLACED_CURSOR_OFFSET : common.stub.php
U_MISPLACED_QUANTIFIER : common.stub.php
U_MISSING_OPERATOR : common.stub.php
U_MISSING_RESOURCE_ERROR : common.stub.php
U_MISSING_SEGMENT_CLOSE : common.stub.php
U_MULTIPLE_ANTE_CONTEXTS : common.stub.php
U_MULTIPLE_COMPOUND_FILTERS : common.stub.php
U_MULTIPLE_CURSORS : common.stub.php
U_MULTIPLE_DECIMAL_SEPARATORS : common.stub.php
U_MULTIPLE_DECIMAL_SEPERATORS : common.stub.php
U_MULTIPLE_EXPONENTIAL_SYMBOLS : common.stub.php
U_MULTIPLE_PAD_SPECIFIERS : common.stub.php
U_MULTIPLE_PERCENT_SYMBOLS : common.stub.php
U_MULTIPLE_PERMILL_SYMBOLS : common.stub.php
U_MULTIPLE_POST_CONTEXTS : common.stub.php
U_NO_SPACE_AVAILABLE : common.stub.php
U_NO_WRITE_PERMISSION : common.stub.php
U_PARSE_ERROR : common.stub.php
U_PARSE_ERROR_LIMIT : common.stub.php
U_PARSE_ERROR_START : common.stub.php
U_PATTERN_SYNTAX_ERROR : common.stub.php
U_PRIMARY_TOO_LONG_ERROR : common.stub.php
U_REGEX_BAD_ESCAPE_SEQUENCE : common.stub.php
U_REGEX_BAD_INTERVAL : common.stub.php
U_REGEX_ERROR_LIMIT : common.stub.php
U_REGEX_ERROR_START : common.stub.php
U_REGEX_INTERNAL_ERROR : common.stub.php
U_REGEX_INVALID_BACK_REF : common.stub.php
U_REGEX_INVALID_FLAG : common.stub.php
U_REGEX_INVALID_STATE : common.stub.php
U_REGEX_LOOK_BEHIND_LIMIT : common.stub.php
U_REGEX_MAX_LT_MIN : common.stub.php
U_REGEX_MISMATCHED_PAREN : common.stub.php
U_REGEX_NUMBER_TOO_BIG : common.stub.php
U_REGEX_PROPERTY_SYNTAX : common.stub.php
U_REGEX_RULE_SYNTAX : common.stub.php
U_REGEX_SET_CONTAINS_STRING : common.stub.php
U_REGEX_UNIMPLEMENTED : common.stub.php
U_RESOURCE_TYPE_MISMATCH : common.stub.php
U_RULE_MASK_ERROR : common.stub.php
U_SAFECLONE_ALLOCATED_WARNING : common.stub.php
U_SORT_KEY_TOO_SHORT_WARNING : common.stub.php
U_STANDARD_ERROR_LIMIT : common.stub.php
U_STATE_OLD_WARNING : common.stub.php
U_STATE_TOO_OLD_ERROR : common.stub.php
U_STRING_NOT_TERMINATED_WARNING : common.stub.php
U_STRINGPREP_CHECK_BIDI_ERROR : common.stub.php
U_STRINGPREP_PROHIBITED_ERROR : common.stub.php
U_STRINGPREP_UNASSIGNED_ERROR : common.stub.php
U_TOO_MANY_ALIASES_ERROR : common.stub.php
U_TRAILING_BACKSLASH : common.stub.php
U_TRUNCATED_CHAR_FOUND : common.stub.php
U_UNCLOSED_SEGMENT : common.stub.php
U_UNDEFINED_SEGMENT_REFERENCE : common.stub.php
U_UNDEFINED_VARIABLE : common.stub.php
U_UNEXPECTED_TOKEN : common.stub.php
U_UNMATCHED_BRACES : common.stub.php
U_UNQUOTED_SPECIAL : common.stub.php
U_UNSUPPORTED_ATTRIBUTE : common.stub.php
U_UNSUPPORTED_ERROR : common.stub.php
U_UNSUPPORTED_ESCAPE_SEQUENCE : common.stub.php
U_UNSUPPORTED_PROPERTY : common.stub.php
U_UNTERMINATED_QUOTE : common.stub.php
U_USELESS_COLLATOR_ERROR : common.stub.php
U_USING_DEFAULT_WARNING : common.stub.php
U_USING_FALLBACK_WARNING : common.stub.php
U_VARIABLE_RANGE_EXHAUSTED : common.stub.php
U_VARIABLE_RANGE_OVERLAP : common.stub.php
U_ZERO_ERROR : common.stub.php
ucs_a1_cp936_table : unicode_table_cp936.h
ucs_a1_cp936_table_max : unicode_table_cp936.h
ucs_a1_cp936_table_min : unicode_table_cp936.h
ucs_a1_jis_table : unicode_table_jis.h
ucs_a1_jis_table_max : unicode_table_jis.h
ucs_a1_jis_table_min : unicode_table_jis.h
ucs_a1_uhc_table : unicode_table_uhc.h
ucs_a1_uhc_table_max : unicode_table_uhc.h
ucs_a1_uhc_table_min : unicode_table_uhc.h
ucs_a2_cp936_table : unicode_table_cp936.h
ucs_a2_cp936_table_max : unicode_table_cp936.h
ucs_a2_cp936_table_min : unicode_table_cp936.h
ucs_a2_jis_table : unicode_table_jis.h
ucs_a2_jis_table_max : unicode_table_jis.h
ucs_a2_jis_table_min : unicode_table_jis.h
ucs_a2_uhc_table : unicode_table_uhc.h
ucs_a2_uhc_table_max : unicode_table_uhc.h
ucs_a2_uhc_table_min : unicode_table_uhc.h
ucs_a3_cp936_table : unicode_table_cp936.h
ucs_a3_cp936_table_max : unicode_table_cp936.h
ucs_a3_cp936_table_min : unicode_table_cp936.h
ucs_a3_uhc_table : unicode_table_uhc.h
ucs_a3_uhc_table_max : unicode_table_uhc.h
ucs_a3_uhc_table_min : unicode_table_uhc.h
ucs_cf_cp936_table : unicode_table_cp936.h
ucs_cf_cp936_table_max : unicode_table_cp936.h
ucs_cf_cp936_table_min : unicode_table_cp936.h
ucs_ci_cp936_table_max : unicode_table_cp936.h
ucs_ci_cp936_table_min : unicode_table_cp936.h
ucs_ci_s_cp936_table : unicode_table_cp936.h
ucs_hff_cp936_table_max : unicode_table_cp936.h
ucs_hff_cp936_table_min : unicode_table_cp936.h
ucs_hff_s_cp936_table : unicode_table_cp936.h
ucs_i_cp936_table : unicode_table_cp936.h
ucs_i_cp936_table_max : unicode_table_cp936.h
ucs_i_cp936_table_min : unicode_table_cp936.h
ucs_i_gb2312_table : unicode_table_gb2312.h
ucs_i_gb2312_table_max : unicode_table_gb2312.h
ucs_i_gb2312_table_min : unicode_table_gb2312.h
ucs_i_jis_table : unicode_table_jis.h
ucs_i_jis_table_max : unicode_table_jis.h
ucs_i_jis_table_min : unicode_table_jis.h
ucs_i_uhc_table : unicode_table_uhc.h
ucs_i_uhc_table_max : unicode_table_uhc.h
ucs_i_uhc_table_min : unicode_table_uhc.h
ucs_r1_uhc_table : unicode_table_uhc.h
ucs_r1_uhc_table_max : unicode_table_uhc.h
ucs_r1_uhc_table_min : unicode_table_uhc.h
ucs_r2_uhc_table : unicode_table_uhc.h
ucs_r2_uhc_table_max : unicode_table_uhc.h
ucs_r2_uhc_table_min : unicode_table_uhc.h
ucs_r_jis_table : unicode_table_jis.h
ucs_r_jis_table_max : unicode_table_jis.h
ucs_r_jis_table_min : unicode_table_jis.h
ucs_s_uhc_table : unicode_table_uhc.h
ucs_s_uhc_table_max : unicode_table_uhc.h
ucs_s_uhc_table_min : unicode_table_uhc.h
ucs_sfv_cp936_table : unicode_table_cp936.h
ucs_sfv_cp936_table_max : unicode_table_cp936.h
ucs_sfv_cp936_table_min : unicode_table_cp936.h
UDPLITE_RECV_CSCOV : sockets.stub.php
UDPLITE_SEND_CSCOV : sockets.stub.php
uhc1_ucs_table : unicode_table_uhc.h
uhc1_ucs_table_size : unicode_table_uhc.h
uhc3_ucs_table : unicode_table_uhc.h
uhc3_ucs_table_size : unicode_table_uhc.h
ULOC_ACTUAL_LOCALE : collator.stub.php
ULOC_VALID_LOCALE : collator.stub.php
unclean_eval : phpdbg.h
UNKNOWN_TYPE : soap.stub.php
unmatched_empty_pair : php_pcre.h
unmatched_null_pair : php_pcre.h
UPLOAD_ERR_CANT_WRITE : main.stub.php
UPLOAD_ERR_EXTENSION : main.stub.php
UPLOAD_ERR_FORM_SIZE : main.stub.php
UPLOAD_ERR_INI_SIZE : main.stub.php
UPLOAD_ERR_NO_FILE : main.stub.php
UPLOAD_ERR_NO_TMP_DIR : main.stub.php
UPLOAD_ERR_OK : main.stub.php
UPLOAD_ERR_PARTIAL : main.stub.php
use_exceptions : php_intl.h
use_include_path : func_interceptors.c
use_soap_error_handler : php_soap.h
usg_hdr : apprentice.c