Convert number to words php

You can do this in many ways I am mentioning here two ways by using The NumberFormatter class as mentioned in Martindilling answer [if you have php version 5.3.0 or higher and also PECL extension 1.0.0 or higher] or by using the following custom function.

function convertNumberToWord[$num = false]
{
    $num = str_replace[array[',', ' '], '' , trim[$num]];
    if[! $num] {
        return false;
    }
    $num = [int] $num;
    $words = array[];
    $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];
    for [$i = 0; $i < count[$num_levels]; $i++] {
        $levels--;
        $hundreds = [int] [$num_levels[$i] / 100];
        $hundreds = [$hundreds ? ' ' . $list1[$hundreds] . ' hundred' . ' ' : ''];
        $tens = [int] [$num_levels[$i] % 100];
        $singles = '';
        if [ $tens < 20 ] {
            $tens = [$tens ? ' ' . $list1[$tens] . ' ' : '' ];
        } else {
            $tens = [int][$tens / 10];
            $tens = ' ' . $list2[$tens] . ' ';
            $singles = [int] [$num_levels[$i] % 10];
            $singles = ' ' . $list1[$singles] . ' ';
        }
        $words[] = $hundreds . $tens . $singles . [ [ $levels && [ int ] [ $num_levels[$i] ] ] ? ' ' . $list3[$levels] . ' ' : '' ];
    } //end for loop
    $commas = count[$words];
    if [$commas > 1] {
        $commas = $commas - 1;
    }
    return implode[' ', $words];
}

Calculator Use

Convert a number to a US English word representation. Convert a number to USD currency and check writing amounts rounded to 2 decimal places.  Choose to have words for the numbers in lowercase, uppercase or title case to easily copy and paste to another application.

This converter will convert numbers to words and figures to words. The number to words can be done for real numbers and Scientific E Notation. Limited to use of 90 characters and 1e-90 and 1e+90.

References for Number Names

wikipedia.org - Names of large numbers

A PHP function to convert numbers to words. Useful for currency displays, etc.

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