Justify text with php

Justify Text.php

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<?php

ini_set( 'display_errors', 'On' );
error_reporting( E_ALL );

$strings = array(
    'hello world there ok then' => 'hello world there ok then',
    'hello' => ' hello ',
    'ok then' => 'ok then',
    'this string is almost certainly longer than 48 I think' => 'this string is almost certainly longer than 48 I',
    'two words' => 'two words',
    'three ok words' => 'three ok words',
    '1 2 3 4 5 6 7 8 9' => '1 2 3 4 5 6 7 8 9'
);

function justify( $str_in, $desired_length=48 ) {
    // Cut off long lines
    if ( strlen( $str_in ) > $desired_length ) {
        $str_in = current( explode( "\n", wordwrap( $str_in, $desired_length ) ) );
    }
    // String length
    $string_length = strlen( $str_in );
    // Number of spaces
    $spaces_count = substr_count( $str_in, ' ' );
    // Number of total spaces needed
    $needed_spaces_count = $desired_length - $string_length + $spaces_count;
    // One word, so split spaces in half, ceil it add it to eaither side of the word
    // Then take the first 48 chars
    if ( $spaces_count === 0 ) {
        return str_pad( $str_in, $desired_length, ' ', STR_PAD_BOTH );
    }
    // How many spaces the string needs per space to have atleast 48 characters
    $spaces_per_space = ceil( $needed_spaces_count / $spaces_count );
    // Replace all spaces with the neccessary spaces per space
    // This string will sometimes be too long
    $spaced_string = preg_replace( '~\s+~', str_repeat( ' ', $spaces_per_space ), $str_in );
    // Now, some strings will be too long so you need to replace the spaces with one less space until
    // the desired amount of characters is reached
    //
    // This is done with preg_replace callback and the $limit parameter
    // Limit replacements to the exact number we need to reach the desired length
    return preg_replace_callback(
        sprintf( '~\s{%s}~', $spaces_per_space ),
        function ( $m ) use( $spaces_per_space ) {
            return str_repeat( ' ', $spaces_per_space-1 );
        },
        $spaced_string,
        strlen( $spaced_string ) - $desired_length
    );
}



foreach( $strings as $string => $desired_output ) {
    echo justify( $string ) . "\n";
}
 

?>
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Output

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hello      world       there       ok       then
                     hello                      
ok                                          then
this string is almost certainly longer than 48 I
two                                        words
three                  ok                  words
1    2     3     4     5     6     7     8     9
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Le code ne justifie pas le texte !