/usr/share/php/maps/iso-8859-4.map is in php-font-lib 0.3.1+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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!01 U+0001 .notdef
!02 U+0002 .notdef
!03 U+0003 .notdef
!04 U+0004 .notdef
!05 U+0005 .notdef
!06 U+0006 .notdef
!07 U+0007 .notdef
!08 U+0008 .notdef
!09 U+0009 .notdef
!0A U+000A .notdef
!0B U+000B .notdef
!0C U+000C .notdef
!0D U+000D .notdef
!0E U+000E .notdef
!0F U+000F .notdef
!10 U+0010 .notdef
!11 U+0011 .notdef
!12 U+0012 .notdef
!13 U+0013 .notdef
!14 U+0014 .notdef
!15 U+0015 .notdef
!16 U+0016 .notdef
!17 U+0017 .notdef
!18 U+0018 .notdef
!19 U+0019 .notdef
!1A U+001A .notdef
!1B U+001B .notdef
!1C U+001C .notdef
!1D U+001D .notdef
!1E U+001E .notdef
!1F U+001F .notdef
!20 U+0020 space
!21 U+0021 exclam
!22 U+0022 quotedbl
!23 U+0023 numbersign
!24 U+0024 dollar
!25 U+0025 percent
!26 U+0026 ampersand
!27 U+0027 quotesingle
!28 U+0028 parenleft
!29 U+0029 parenright
!2A U+002A asterisk
!2B U+002B plus
!2C U+002C comma
!2D U+002D hyphen
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!2F U+002F slash
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!31 U+0031 one
!32 U+0032 two
!33 U+0033 three
!34 U+0034 four
!35 U+0035 five
!36 U+0036 six
!37 U+0037 seven
!38 U+0038 eight
!39 U+0039 nine
!3A U+003A colon
!3B U+003B semicolon
!3C U+003C less
!3D U+003D equal
!3E U+003E greater
!3F U+003F question
!40 U+0040 at
!41 U+0041 A
!42 U+0042 B
!43 U+0043 C
!44 U+0044 D
!45 U+0045 E
!46 U+0046 F
!47 U+0047 G
!48 U+0048 H
!49 U+0049 I
!4A U+004A J
!4B U+004B K
!4C U+004C L
!4D U+004D M
!4E U+004E N
!4F U+004F O
!50 U+0050 P
!51 U+0051 Q
!52 U+0052 R
!53 U+0053 S
!54 U+0054 T
!55 U+0055 U
!56 U+0056 V
!57 U+0057 W
!58 U+0058 X
!59 U+0059 Y
!5A U+005A Z
!5B U+005B bracketleft
!5C U+005C backslash
!5D U+005D bracketright
!5E U+005E asciicircum
!5F U+005F underscore
!60 U+0060 grave
!61 U+0061 a
!62 U+0062 b
!63 U+0063 c
!64 U+0064 d
!65 U+0065 e
!66 U+0066 f
!67 U+0067 g
!68 U+0068 h
!69 U+0069 i
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!76 U+0076 v
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!7B U+007B braceleft
!7C U+007C bar
!7D U+007D braceright
!7E U+007E asciitilde
!7F U+007F .notdef
!80 U+0080 .notdef
!81 U+0081 .notdef
!82 U+0082 .notdef
!83 U+0083 .notdef
!84 U+0084 .notdef
!85 U+0085 .notdef
!86 U+0086 .notdef
!87 U+0087 .notdef
!88 U+0088 .notdef
!89 U+0089 .notdef
!8A U+008A .notdef
!8B U+008B .notdef
!8C U+008C .notdef
!8D U+008D .notdef
!8E U+008E .notdef
!8F U+008F .notdef
!90 U+0090 .notdef
!91 U+0091 .notdef
!92 U+0092 .notdef
!93 U+0093 .notdef
!94 U+0094 .notdef
!95 U+0095 .notdef
!96 U+0096 .notdef
!97 U+0097 .notdef
!98 U+0098 .notdef
!99 U+0099 .notdef
!9A U+009A .notdef
!9B U+009B .notdef
!9C U+009C .notdef
!9D U+009D .notdef
!9E U+009E .notdef
!9F U+009F .notdef
!A0 U+00A0 space
!A1 U+0104 Aogonek
!A2 U+0138 kgreenlandic
!A3 U+0156 Rcommaaccent
!A4 U+00A4 currency
!A5 U+0128 Itilde
!A6 U+013B Lcommaaccent
!A7 U+00A7 section
!A8 U+00A8 dieresis
!A9 U+0160 Scaron
!AA U+0112 Emacron
!AB U+0122 Gcommaaccent
!AC U+0166 Tbar
!AD U+00AD hyphen
!AE U+017D Zcaron
!AF U+00AF macron
!B0 U+00B0 degree
!B1 U+0105 aogonek
!B2 U+02DB ogonek
!B3 U+0157 rcommaaccent
!B4 U+00B4 acute
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!B9 U+0161 scaron
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!BC U+0167 tbar
!BD U+014A Eng
!BE U+017E zcaron
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!C0 U+0100 Amacron
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!C2 U+00C2 Acircumflex
!C3 U+00C3 Atilde
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!C5 U+00C5 Aring
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!CD U+00CD Iacute
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!D1 U+0145 Ncommaaccent
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!D3 U+0136 Kcommaaccent
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!D5 U+00D5 Otilde
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!D7 U+00D7 multiply
!D8 U+00D8 Oslash
!D9 U+0172 Uogonek
!DA U+00DA Uacute
!DB U+00DB Ucircumflex
!DC U+00DC Udieresis
!DD U+0168 Utilde
!DE U+016A Umacron
!DF U+00DF germandbls
!E0 U+0101 amacron
!E1 U+00E1 aacute
!E2 U+00E2 acircumflex
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!E6 U+00E6 ae
!E7 U+012F iogonek
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!E9 U+00E9 eacute
!EA U+0119 eogonek
!EB U+00EB edieresis
!EC U+0117 edotaccent
!ED U+00ED iacute
!EE U+00EE icircumflex
!EF U+012B imacron
!F0 U+0111 dcroat
!F1 U+0146 ncommaaccent
!F2 U+014D omacron
!F3 U+0137 kcommaaccent
!F4 U+00F4 ocircumflex
!F5 U+00F5 otilde
!F6 U+00F6 odieresis
!F7 U+00F7 divide
!F8 U+00F8 oslash
!F9 U+0173 uogonek
!FA U+00FA uacute
!FB U+00FB ucircumflex
!FC U+00FC udieresis
!FD U+0169 utilde
!FE U+016B umacron
!FF U+02D9 dotaccent
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