Predefined Constants

INTL_ICU_DATA_VERSION (string)

Data version in ICU4C.

INTL_ICU_VERSION (string)

The current ICU library version as a dotted-decimal string.

INTL_MAX_LOCALE_LEN (int)

Limit on locale length, set to 80 in PHP code. Locale names longer than this limit will not be accepted.

IDNA_DEFAULT (int)

Prohibit processing of unassigned codepoints in the input for IDN functions and do not check if the input conforms to domain name ASCII rules.

IDNA_ALLOW_UNASSIGNED (int)

Allow processing of unassigned codepoints in the input for IDN functions.

IDNA_USE_STD3_RULES (int)

Check if the input for IDN functions conforms to domain name ASCII rules.

IDNA_CHECK_BIDI (int)

Check whether the input conforms to the BiDi rules. Ignored by the IDNA2003 implementation, which always performs this check.

IDNA_CHECK_CONTEXTJ (int)

Check whether the input conforms to the CONTEXTJ rules. Ignored by the IDNA2003 implementation, as this check is new in IDNA2008.

IDNA_NONTRANSITIONAL_TO_ASCII (int)

Option for nontransitional processing in idn_to_ascii(). Transitional processing is activated by default. This option is ignored by the IDNA2003 implementation.

IDNA_NONTRANSITIONAL_TO_UNICODE (int)

Option for nontransitional processing in idn_to_utf8(). Transitional processing is activated by default. This option is ignored by the IDNA2003 implementation.

INTL_IDNA_VARIANT_2003 (int)

Use IDNA 2003 algorithm in idn_to_utf8() and idn_to_ascii(). This is the default. This constant and using the default has been deprecated as of PHP 7.2.0.

INTL_IDNA_VARIANT_UTS46 (int)

Use UTS #46 algorithm in idn_to_utf8() and idn_to_ascii(). Available as of ICU 4.6.

GRAPHEME_EXTR_COUNT (int)

The number of default grapheme clusters to extract.

GRAPHEME_EXTR_MAXBYTES (int)

The maximum number of bytes returned.

GRAPHEME_EXTR_MAXCHARS (int)

The maximum number of UTF-8 characters returned.

The following errors are part of a bitmask returned by the UTS #46 algorithm in idn_to_utf8() and idn_to_ascii().

IDNA_ERROR_EMPTY_LABEL (int)

IDNA_ERROR_LABEL_TOO_LONG (int)

IDNA_ERROR_DOMAIN_NAME_TOO_LONG (int)

IDNA_ERROR_LEADING_HYPHEN (int)

IDNA_ERROR_TRAILING_HYPHEN (int)

IDNA_ERROR_HYPHEN_3_4 (int)

IDNA_ERROR_LEADING_COMBINING_MARK (int)

IDNA_ERROR_DISALLOWED (int)

IDNA_ERROR_PUNYCODE (int)

IDNA_ERROR_LABEL_HAS_DOT (int)

IDNA_ERROR_INVALID_ACE_LABEL (int)

IDNA_ERROR_BIDI (int)

IDNA_ERROR_CONTEXTJ (int)

ULOC_ACTUAL_LOCALE (int)

The locale the data actually comes from.

ULOC_VALID_LOCALE (int)

The most specific locale supported by ICU.

U_AMBIGUOUS_ALIAS_WARNING (int)

This converter alias can go to different converter implementations.

U_BAD_VARIABLE_DEFINITION (int)

Missing '$' or duplicate variable name.

U_BRK_ASSIGN_ERROR (int)

Syntax error in RBBI rule assignment statement.

U_BRK_ERROR_LIMIT (int)

This must always be the last value to indicate the limit for Break Iterator failures.

U_BRK_ERROR_START (int)

Start of codes indicating Break Iterator failures.

U_BRK_HEX_DIGITS_EXPECTED (int)

Hex digits expected as part of a escaped char in a rule.

U_BRK_INIT_ERROR (int)

Initialization failure. Probable missing ICU Data.

U_BRK_INTERNAL_ERROR (int)

An internal error (bug) was detected.

U_BRK_MALFORMED_RULE_TAG (int)

The {nnn} tag on a rule is mal formed.

U_BRK_MISMATCHED_PAREN (int)

Mis-matched parentheses in an RBBI rule.

U_BRK_NEW_LINE_IN_QUOTED_STRING (int)

Missing closing quote in an RBBI rule.

U_BRK_RULE_EMPTY_SET (int)

Rule contains an empty Unicode Set.

U_BRK_RULE_SYNTAX (int)

Syntax error in RBBI rule.

U_BRK_SEMICOLON_EXPECTED (int)

Missing ';' at the end of a RBBI rule.

U_BRK_UNCLOSED_SET (int)

UnicodeSet writing an RBBI rule missing a closing ']'.

U_BRK_UNDEFINED_VARIABLE (int)

Use of an undefined $Variable in an RBBI rule.

U_BRK_UNRECOGNIZED_OPTION (int)

Option in RBBI rules not recognized.

U_BRK_VARIABLE_REDFINITION (int)

RBBI rule variable redefined.

U_BUFFER_OVERFLOW_ERROR (int)

A result would not fit in the supplied buffer.

U_CE_NOT_FOUND_ERROR (int)

Currently used only while setting variable top, but can be used generally.

U_COLLATOR_VERSION_MISMATCH (int)

Collator version is not compatible with the base version.

U_DIFFERENT_UCA_VERSION (int)

ucol_open encountered a mismatch between UCA version and collator image version, so the collator was constructed from rules. No impact to further function.

U_ENUM_OUT_OF_SYNC_ERROR (int)

UEnumeration out of sync with underlying collection.

U_ERROR_LIMIT (int)

Alias of U_PLUGIN_ERROR_LIMIT.

U_ERROR_WARNING_LIMIT (int)

This must always be the last warning value to indicate the limit for UErrorCode warnings (last warning code +1).

U_ERROR_WARNING_START (int)

Start of information results (semantically successful).

U_FILE_ACCESS_ERROR (int)

The requested file cannot be found.

U_FMT_PARSE_ERROR_LIMIT (int)

The limit for format library errors.

U_FMT_PARSE_ERROR_START (int)

Start of format library errors.

U_IDNA_ACE_PREFIX_ERROR (int)

U_IDNA_CHECK_BIDI_ERROR (int)

U_IDNA_DOMAIN_NAME_TOO_LONG_ERROR (int)

U_IDNA_ERROR_LIMIT (int)

U_IDNA_ERROR_START (int)

U_IDNA_LABEL_TOO_LONG_ERROR (int)

U_IDNA_PROHIBITED_ERROR (int)

U_IDNA_STD3_ASCII_RULES_ERROR (int)

U_IDNA_UNASSIGNED_ERROR (int)

U_IDNA_VERIFICATION_ERROR (int)

U_IDNA_ZERO_LENGTH_LABEL_ERROR (int)

U_ILLEGAL_ARGUMENT_ERROR (int)

Indicates an incorrect argument value.

U_ILLEGAL_CHAR_FOUND (int)

Character conversion: Illegal input sequence.

U_ILLEGAL_CHAR_IN_SEGMENT (int)

Unused as of ICU 2.4.

U_ILLEGAL_CHARACTER (int)

A special character is outside its allowed context.

U_ILLEGAL_ESCAPE_SEQUENCE (int)

ISO-2022 illlegal escape sequence.

U_ILLEGAL_PAD_POSITION (int)

Pad symbol misplaced in number pattern.

U_INDEX_OUTOFBOUNDS_ERROR (int)

Trying to access the index that is out of bounds.

U_INTERNAL_PROGRAM_ERROR (int)

Indicates a bug in the library code.

U_INTERNAL_TRANSLITERATOR_ERROR (int)

Internal transliterator system error.

U_INVALID_CHAR_FOUND (int)

Character conversion: Unmappable input sequence. In other APIs: Invalid character.

U_INVALID_FORMAT_ERROR (int)

Data format is not what is expected.

U_INVALID_FUNCTION (int)

A '&fn()' rule specifies an unknown transliterator.

U_INVALID_ID (int)

A '::id' rule specifies an unknown transliterator.

U_INVALID_PROPERTY_PATTERN (int)

Unused as of ICU 2.4.

U_INVALID_RBT_SYNTAX (int)

A '::id' rule was passed to the RuleBasedTransliterator parser.

U_INVALID_STATE_ERROR (int)

Requested operation can not be completed with ICU in its current state.

U_INVALID_TABLE_FILE (int)

Conversion table file not found.

U_INVALID_TABLE_FORMAT (int)

Conversion table file found, but corrupted.

U_INVARIANT_CONVERSION_ERROR (int)

Unable to convert a UChar* string to char* with the invariant converter.

U_MALFORMED_EXPONENTIAL_PATTERN (int)

Grouping symbol in exponent pattern.

U_MALFORMED_PRAGMA (int)

A 'use' pragma is invalid.

U_MALFORMED_RULE (int)

Elements of a rule are misplaced.

U_MALFORMED_SET (int)

A UnicodeSet pattern is invalid.

U_MALFORMED_SYMBOL_REFERENCE (int)

Unused as of ICU 2.4.

U_MALFORMED_UNICODE_ESCAPE (int)

A Unicode escape pattern is invalid.

U_MALFORMED_VARIABLE_DEFINITION (int)

A variable definition is invalid.

U_MALFORMED_VARIABLE_REFERENCE (int)

A variable reference is invalid.

U_MEMORY_ALLOCATION_ERROR (int)

Memory allocation error.

U_MESSAGE_PARSE_ERROR (int)

Unable to parse a message (message format).

U_MISMATCHED_SEGMENT_DELIMITERS (int)

Unused as of ICU 2.4.

U_MISPLACED_ANCHOR_START (int)

A start anchor appears at an illegal position.

U_MISPLACED_COMPOUND_FILTER (int)

A compound filter is in an invalid location.

U_MISPLACED_CURSOR_OFFSET (int)

A cursor offset occurs at an illegal position.

U_MISPLACED_QUANTIFIER (int)

A quantifier appears after a segment close delimiter.

U_MISSING_OPERATOR (int)

A rule contains no operator.

U_MISSING_RESOURCE_ERROR (int)

The requested resource cannot be found.

U_MISSING_SEGMENT_CLOSE (int)

Unused as of ICU 2.4.

U_MULTIPLE_ANTE_CONTEXTS (int)

More than one ante context.

U_MULTIPLE_COMPOUND_FILTERS (int)

More than one compound filter.

U_MULTIPLE_CURSORS (int)

More than one cursor.

U_MULTIPLE_DECIMAL_SEPARATORS (int)

More than one decimal separator in number pattern.

U_MULTIPLE_DECIMAL_SEPERATORS (int)

Alias of U_MULTIPLE_DECIMAL_SEPARATORS.

U_MULTIPLE_EXPONENTIAL_SYMBOLS (int)

More than one exponent symbol in number pattern.

U_MULTIPLE_PAD_SPECIFIERS (int)

More than one pad symbol in number pattern.

U_MULTIPLE_PERCENT_SYMBOLS (int)

More than one percent symbol in number pattern.

U_MULTIPLE_PERMILL_SYMBOLS (int)

More than one permill symbol in number pattern.

U_MULTIPLE_POST_CONTEXTS (int)

More than one post context.

U_NO_SPACE_AVAILABLE (int)

No space available for in-buffer expansion for Arabic shaping.

U_NO_WRITE_PERMISSION (int)

Attempt to modify read-only or constant data.

U_PARSE_ERROR (int)

Equivalent to Java ParseException.

U_PARSE_ERROR_LIMIT (int)

The limit for Transliterator errors.

U_PARSE_ERROR_START (int)

Start of Transliterator errors.

U_PATTERN_SYNTAX_ERROR (int)

Syntax error in format pattern.

U_PRIMARY_TOO_LONG_ERROR (int)

User tried to set variable top to a primary that is longer than two bytes.

U_REGEX_BAD_ESCAPE_SEQUENCE (int)

Unrecognized backslash escape sequence in pattern.

U_REGEX_BAD_INTERVAL (int)

Error in {min,max} interval.

U_REGEX_ERROR_LIMIT (int)

This must always be the last value to indicate the limit for regexp errors.

U_REGEX_ERROR_START (int)

Start of codes indicating Regexp failures.

U_REGEX_INTERNAL_ERROR (int)

An internal error (bug) was detected.

U_REGEX_INVALID_BACK_REF (int)

Back-reference to a non-existent capture group.

U_REGEX_INVALID_FLAG (int)

Invalid value for match mode flags.

U_REGEX_INVALID_STATE (int)

RegexMatcher in invalid state for requested operation.

U_REGEX_LOOK_BEHIND_LIMIT (int)

Look-Behind pattern matches must have a bounded maximum length.

U_REGEX_MAX_LT_MIN (int)

In {min,max}, max is less than min.

U_REGEX_MISMATCHED_PAREN (int)

Incorrectly nested parentheses in regexp pattern.

U_REGEX_NUMBER_TOO_BIG (int)

Decimal number is too large.

U_REGEX_PROPERTY_SYNTAX (int)

Incorrect Unicode property.

U_REGEX_RULE_SYNTAX (int)

Syntax error in regexp pattern.

U_REGEX_SET_CONTAINS_STRING (int)

Regexps cannot have UnicodeSets containing strings.

U_REGEX_UNIMPLEMENTED (int)

Use of regexp feature that is not yet implemented.

U_RESOURCE_TYPE_MISMATCH (int)

An operation is requested over a resource that does not support it.

U_RULE_MASK_ERROR (int)

A rule is hidden by an earlier more general rule.

U_SAFECLONE_ALLOCATED_WARNING (int)

A SafeClone operation required allocating memory (informational only).

U_SORT_KEY_TOO_SHORT_WARNING (int)

Number of levels requested in getBound is higher than the number of levels in the sort key.

U_STANDARD_ERROR_LIMIT (int)

This must always be the last value to indicate the limit for standard errors.

U_STATE_OLD_WARNING (int)

ICU has to use compatibility layer to construct the service. Expect performance/memory usage degradation.

U_STATE_TOO_OLD_ERROR (int)

ICU cannot construct a service from this state, as it is no longer supported.

U_STRING_NOT_TERMINATED_WARNING (int)

An output string could not be NUL-terminated because output length==destCapacity.

U_STRINGPREP_CHECK_BIDI_ERROR (int)

Alias of U_IDNA_CHECK_BIDI_ERROR.

U_STRINGPREP_PROHIBITED_ERROR (int)

Alias of U_IDNA_PROHIBITED_ERROR.

U_STRINGPREP_UNASSIGNED_ERROR (int)

Alias of U_IDNA_UNASSIGNED_ERROR.

U_TOO_MANY_ALIASES_ERROR (int)

There are too many aliases in the path to the requested resource. It is very possible that a circular alias definition has occurred.

U_TRAILING_BACKSLASH (int)

A dangling backslash.

U_TRUNCATED_CHAR_FOUND (int)

Character conversion: Incomplete input sequence.

U_UNCLOSED_SEGMENT (int)

A closing ')' is missing.

U_UNDEFINED_SEGMENT_REFERENCE (int)

A segment reference does not correspond to a defined segment.

U_UNDEFINED_VARIABLE (int)

A variable reference does not correspond to a defined variable.

U_UNEXPECTED_TOKEN (int)

Syntax error in format pattern.

U_UNMATCHED_BRACES (int)

Braces do not match in message pattern.

U_UNQUOTED_SPECIAL (int)

A special character was not quoted or escaped.

U_UNSUPPORTED_ATTRIBUTE (int)

Unused as of ICU 2.4.

U_UNSUPPORTED_ERROR (int)

Requested operation not supported in current context.

U_UNSUPPORTED_ESCAPE_SEQUENCE (int)

ISO-2022 unsupported escape sequence.

U_UNSUPPORTED_PROPERTY (int)

Unused as of ICU 2.4.

U_UNTERMINATED_QUOTE (int)

A closing single quote is missing.

U_USELESS_COLLATOR_ERROR (int)

Collator is options only and no base is specified.

U_USING_DEFAULT_WARNING (int)

A resource bundle lookup returned a result from the root locale (not an error).

U_USING_FALLBACK_WARNING (int)

A resource bundle lookup returned a fallback result (not an error).

U_VARIABLE_RANGE_EXHAUSTED (int)

Too many stand-ins generated for the given variable range.

U_VARIABLE_RANGE_OVERLAP (int)

The variable range overlaps characters used in rules.

U_ZERO_ERROR (int)

No error, no warning.