How to Convert Number to Words in PHP

Hello devs,

In this PHP tutorial, I will show you a simple way to convert numbers to words in PHP. Sometimes we need to convert decimal numbers to words in PHP applications like when we create invoices, we need to show numbers in words format in many places.

So I am here to show you the way of converting numbers into words in PHP. Assume we do input 1738832 then we will have an output like One Million and Seven Hundreds Thirty Eight Thousand and Eight Hundreds Thirty Two:

This is the thing that we are going to show. See the below example of how to convert number to words in php:

function number_to_word( $num = '' )
{
    $num    = ( string ) ( ( int ) $num );
   
    if( ( int ) ( $num ) && ctype_digit( $num ) )
    {
        $words  = array( );
       
        $num    = str_replace( array( ',' , ' ' ) , '' , trim( $num ) );
       
        $list1  = array('','one','two','three','four','five','six','seven',
            'eight','nine','ten','eleven','twelve','thirteen','fourteen',
            'fifteen','sixteen','seventeen','eighteen','nineteen');
       
        $list2  = array('','ten','twenty','thirty','forty','fifty','sixty',
            'seventy','eighty','ninety','hundred');
       
        $list3  = array('','thousand','million','billion','trillion',
            'quadrillion','quintillion','sextillion','septillion',
            'octillion','nonillion','decillion','undecillion',
            'duodecillion','tredecillion','quattuordecillion',
            'quindecillion','sexdecillion','septendecillion',
            'octodecillion','novemdecillion','vigintillion');
       
        $num_length = strlen( $num );
        $levels = ( int ) ( ( $num_length + 2 ) / 3 );
        $max_length = $levels * 3;
        $num    = substr( '00'.$num , -$max_length );
        $num_levels = str_split( $num , 3 );
       
        foreach( $num_levels as $num_part )
        {
            $levels--;
            $hundreds   = ( int ) ( $num_part / 100 );
            $hundreds   = ( $hundreds ? ' ' . $list1[$hundreds] . ' Hundred' . ( $hundreds == 1 ? '' : 's' ) . ' ' : '' );
            $tens       = ( int ) ( $num_part % 100 );
            $singles    = '';
           
            if( $tens < 20 ) { $tens = ( $tens ? ' ' . $list1[$tens] . ' ' : '' ); } else { $tens = ( int ) ( $tens / 10 ); $tens = ' ' . $list2[$tens] . ' '; $singles = ( int ) ( $num_part % 10 ); $singles = ' ' . $list1[$singles] . ' '; } $words[] = $hundreds . $tens . $singles . ( ( $levels && ( int ) ( $num_part ) ) ? ' ' . $list3[$levels] . ' ' : '' ); } $commas = count( $words ); if( $commas > 1 )
        {
            $commas = $commas - 1;
        }
       
        $words  = implode( ', ' , $words );
       
        $words  = trim( str_replace( ' ,' , ',' , ucwords( $words ) )  , ', ' );
        if( $commas )
        {
            $words  = str_replace( ',' , ' and' , $words );
        }
       
        return $words;
    }
    else if( ! ( ( int ) $num ) )
    {
        return 'Zero';
    }
    return '';
}

echo number_to_word(1738832);

Hope this convert number to words in PHP tutorial will help you.