How to Convert Between Unicode Code Points and Characters in PHP?

Getting Characters from Unicode Code Points in PHP

PHP provides built-in functions to convert between Unicode code points and their corresponding characters. Here's how you can accomplish this:

Step 1: Utilize the mb_html_entity_decode() Function

For proper UTF-8 handling, it's recommended to use the mb_html_entity_decode() function over html_entity_decode() to decode HTML entities.

Step 2: Determine Unicode Code Point using mb_ord()

To determine the Unicode code point of a character, use the mb_ord() function. This function expects UTF-8 encoded strings and returns the corresponding Unicode code point.

Step 3: Construct Character using mb_chr()

Conversely, to construct a character from its Unicode code point, use the mb_chr() function. It takes a Unicode code point and returns the corresponding UTF-8 encoded character.

Example:

Consider the Unicode code point U 010F, which represents the character "ó". You can retrieve this character as follows:

<code class="php">$unicodeCodePoint = hexdec('010F');
$character = mb_chr($unicodeCodePoint);
echo $character; // Output: ó</code>

By utilizing these functions, you can seamlessly work with Unicode code points and their corresponding characters in your PHP applications.

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