How Can I Efficiently Truncate Strings in PHP and Append an Ellipsis?

Truncating Strings in PHP: Trimming and Ellipsis Append

In PHP, efficiently truncating a string to a specified number of characters and appending an ellipsis (...) can be achieved using several methods.

Simple Version:

For a quick truncation, the substr() function can be employed:

$string = substr($string, 0, 10) . '...'; // Truncates to 10 characters

By checking the string's length, we can ensure that the truncated string retains the original length with the ellipsis added:

$string = (strlen($string) > 13) ? substr($string, 0, 10) . '...' : $string; // Truncates to 13 characters (or less)

Functional Approach:

To create a reusable function:

function truncate($string, $length, $dots = "...") {
    return (strlen($string) > $length) ? substr($string, 0, $length - strlen($dots)) . $dots : $string;
}

Advanced Truncation:

To prevent word breaks, the wordwrap() function can be utilized:

function truncate($string, $length = 100, $append = "…") {
    $string = trim($string);

    if (strlen($string) > $length) {
        $string = wordwrap($string, $length);
        $string = explode("\n", $string, 2);
        $string = $string[0] . $append;
    }

    return $string;
}

This function preserves word integrity while truncating the string to the desired length.

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