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To eliminate the Unicode Zero Width Space in PHP, you can use the str_replace function to replace it with an empty string.

Here's an example:

$string = "Hello​ World!"; // has zero width space after 'o'
$newString = str_replace("\u{200b}", "", $string);
echo $newString; // outputs "Hello World!"

In this example, we use the \u{200b} escape sequence to represent the Zero Width Space character and replace it with an empty string. The resulting string will not contain the Zero Width Space.