<?php
 
echo "PHP version: ".phpversion()."\n\n";
 
echo "The following should work in all PHP versions:\n";
echo "\\x can escape a single hex digit: TAB\x9TAB";
echo "\n\n";
 
echo "Three UTF-8 bytes via \\x: \xE0\xBC\x82";    # U+0F02
echo "\n";
echo "Four UTF-8 bytes via \\x: \xF0\x9F\x91\xBE"; # U+1F47E
echo "\n\n";
 
 
echo "Octal notation is \\888 where '888' = 1 - 3 octal digits (values 0 - 7; range 0 - 377):";
echo "\n";
echo "\\11 and \\011: tab\11tabby\011tab";
echo "\n";
echo "\\7, \\07, and \\007: bell\7bell\07bell\007bell";
echo "\n";
echo "\\076 = \076 ; \\176 = \176 ; \\476 = \476 ; \\576 = \576";
echo "\n";
echo "UTF-8 bytes for U+0F02: \\340\\274\\202: \340\274\202";
echo "\n";
echo "UTF-8 bytes for U+1F47E: \\360\\237\\221\\276: \360\237\221\276";
echo "\n";
echo "UTF-8 bytes for U+1F47E: \\760\\637\\621\\676: \760\637\621\676";
echo "\n";
echo "\n\n";
 
echo "The following should work starting in PHP version 7.0.0:\n";
echo "Code Point / UTF-32 via \\u{}: \u{0F02}";
echo "\n";
echo "Code Point / UTF-32 via \\u{}: \u{1F47E}";
?>
 
 

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