How to Convert Unicode Numeric Values to PHP Strings?

Converting Unicode Numeric Values to PHP Strings

Question:

How can PHP create strings that contain individual Unicode characters specified by their "Unicode numeric values"?

Answer:

Prior to PHP 7.0.0, this task required the use of the mb_convert_encoding function. However, PHP 7.0.0 introduced the "Unicode codepoint escape" syntax, which allows direct conversion of Unicode numeric values into PHP strings:

$unicodeChar = "\u{1000}";

This notation creates a string containing a single Unicode character whose Unicode numeric value is 1000 (4096 in decimal).

Example:

// PHP 5.x
$unicodeChar = mb_convert_encoding pack('H*', '1000'), 'UTF-8', 'UTF-16BE');

// PHP 7.0+
$unicodeChar = "\u{1000}";

echo "Unicode character: $unicodeChar\n"; // Outputs: "Ѐ"

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