String syntax and PHP 8

[chrisgraham]

The brace character extraction syntax is no longer allowed.

@@ -1652,7 +1651,7 @@ class FirePHP {

                 $name = $rawName;

-                if ($name{0} == "\0") {
+                if ($name[0] == "\0") {
                     $parts = explode("\0", $name);
                     $name = $parts[2];
                 }
@@ -1839,17 +1838,17 @@ class FirePHP {
             case 2:
                 // return a UTF-16 character from a 2-byte UTF-8 char
                 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
-                return chr(0x07 & (ord($utf8{0}) >> 2))
-                       . chr((0xC0 & (ord($utf8{0}) << 6))
-                       | (0x3F & ord($utf8{1})));
+                return chr(0x07 & (ord($utf8[0]) >> 2))
+                       . chr((0xC0 & (ord($utf8[0]) << 6))
+                       | (0x3F & ord($utf8[1])));

             case 3:
                 // return a UTF-16 character from a 3-byte UTF-8 char
                 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
-                return chr((0xF0 & (ord($utf8{0}) << 4))
-                       | (0x0F & (ord($utf8{1}) >> 2)))
-                       . chr((0xC0 & (ord($utf8{1}) << 6))
-                       | (0x7F & ord($utf8{2})));
+                return chr((0xF0 & (ord($utf8[0]) << 4))
+                       | (0x0F & (ord($utf8[1]) >> 2)))
+                       . chr((0xC0 & (ord($utf8[1]) << 6))
+                       | (0x7F & ord($utf8[2])));
         }

         // ignoring UTF-32 for now, sorry
@@ -1900,7 +1899,7 @@ class FirePHP {
                 */
                 for ($c = 0; $c < $strlen_var; ++$c) {

-                    $ord_var_c = ord($var{$c});
+                    $ord_var_c = ord($var[$c]);

                     switch (true) {
                         case $ord_var_c == 0x08:
@@ -1923,18 +1922,18 @@ class FirePHP {
                         case $ord_var_c == 0x2F:
                         case $ord_var_c == 0x5C:
                             // double quote, slash, slosh
-                            $ascii .= '\\' . $var{$c};
+                            $ascii .= '\\' . $var[$c];
                             break;

                         case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
                             // characters U-00000000 - U-0000007F (same as ASCII)
-                            $ascii .= $var{$c};
+                            $ascii .= $var[$c];
                             break;

                         case (($ord_var_c & 0xE0) == 0xC0):
                             // characters U-00000080 - U-000007FF, mask 110XXXXX
                             // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
-                            $char = pack('C*', $ord_var_c, ord($var{$c + 1}));
+                            $char = pack('C*', $ord_var_c, ord($var[$c + 1]));
                             $c += 1;
                             $utf16 = $this->json_utf82utf16($char);
                             $ascii .= sprintf('\u%04s', bin2hex($utf16));
@@ -1944,8 +1943,8 @@ class FirePHP {
                             // characters U-00000800 - U-0000FFFF, mask 1110XXXX
                             // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                             $char = pack('C*', $ord_var_c,
-                                         ord($var{$c + 1}),
-                                         ord($var{$c + 2}));
+                                         ord($var[$c + 1]),
+                                         ord($var[$c + 2]));
                             $c += 2;
                             $utf16 = $this->json_utf82utf16($char);
                             $ascii .= sprintf('\u%04s', bin2hex($utf16));
@@ -1955,9 +1954,9 @@ class FirePHP {
                             // characters U-00010000 - U-001FFFFF, mask 11110XXX
                             // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                             $char = pack('C*', $ord_var_c,
-                                         ord($var{$c + 1}),
-                                         ord($var{$c + 2}),
-                                         ord($var{$c + 3}));
+                                         ord($var[$c + 1]),
+                                         ord($var[$c + 2]),
+                                         ord($var[$c + 3]));
                             $c += 3;
                             $utf16 = $this->json_utf82utf16($char);
                             $ascii .= sprintf('\u%04s', bin2hex($utf16));
@@ -1967,10 +1966,10 @@ class FirePHP {
                             // characters U-00200000 - U-03FFFFFF, mask 111110XX
                             // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                             $char = pack('C*', $ord_var_c,
-                                         ord($var{$c + 1}),
-                                         ord($var{$c + 2}),
-                                         ord($var{$c + 3}),
-                                         ord($var{$c + 4}));
+                                         ord($var[$c + 1]),
+                                         ord($var[$c + 2]),
+                                         ord($var[$c + 3]),
+                                         ord($var[$c + 4]));
                             $c += 4;
                             $utf16 = $this->json_utf82utf16($char);
                             $ascii .= sprintf('\u%04s', bin2hex($utf16));
@@ -1980,11 +1979,11 @@ class FirePHP {
                             // characters U-04000000 - U-7FFFFFFF, mask 1111110X
                             // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
                             $char = pack('C*', $ord_var_c,
-                                         ord($var{$c + 1}),
-                                         ord($var{$c + 2}),
-                                         ord($var{$c + 3}),
-                                         ord($var{$c + 4}),
-                                         ord($var{$c + 5}));
+                                         ord($var[$c + 1]),
+                                         ord($var[$c + 2]),
+                                         ord($var[$c + 3]),
+                                         ord($var[$c + 4]),
+                                         ord($var[$c + 5]));
                             $c += 5;
                             $utf16 = $this->json_utf82utf16($char);
                             $ascii .= sprintf('\u%04s', bin2hex($utf16));

[cadorn]

Thanks for the compatibility reports!