floatval - PHP code example

Using the PHP Function FloatVal

As PHP is a weakly typed language, you often find yourself working with numbers that are represented as strings. This can happen when you are responding to a client request, performing arithmetic operations or even when feeding values to your database.

In such cases, it is not uncommon to encounter issues due to a variety of factors. One of these issues is that numbers might be stored as floats and then used in functions which expect int values, causing them to produce exceptions or errors. Another issue is that numbers might get converted into floats during various operations such as multiplication. This could lead to unexpected results like 16 * 2.5, which is still an integer within the range of int types.

The floatval function is designed to help you deal with these issues. This function converts a string into a float and returns the resulting value. It works even when there is a comma in the string and is also able to differentiate between different representations of decimal digits such as. or,.

To use the floatval function, you need to pass it a variable of any scalar type (except arrays and objects). The variable should be of type float, or an error will occur.

Moreover, the floatval function is able to convert hexadecimal, octal and binary numbers into floats. This can be especially useful when working with numbers that are represented in base systems other than the standard decimal number system.

floatval example

                    if ($parsedXML = getid3_lib::XML2array($thisfile_riff_WAVE['iXML'][0]['data'])) {
                        $thisfile_riff_WAVE['iXML'][0]['parsed'] = $parsedXML;
                        if (isset($parsedXML['SPEED']['MASTER_SPEED'])) {
                            @list($numerator, $denominator) = explode('/', $parsedXML['SPEED']['MASTER_SPEED']);
                            $thisfile_riff_WAVE['iXML'][0]['master_speed'] = $numerator / ($denominator ? $denominator : 1000);
                        }
                        if (isset($parsedXML['SPEED']['TIMECODE_RATE'])) {
                            @list($numerator, $denominator) = explode('/', $parsedXML['SPEED']['TIMECODE_RATE']);
                            $thisfile_riff_WAVE['iXML'][0]['timecode_rate'] = $numerator / ($denominator ? $denominator : 1000);
                        }
                        if (isset($parsedXML['SPEED']['TIMESTAMP_SAMPLES_SINCE_MIDNIGHT_LO']) && !empty($parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE']) && !empty($thisfile_riff_WAVE['iXML'][0]['timecode_rate'])) {
                            $samples_since_midnight = floatval(ltrim($parsedXML['SPEED']['TIMESTAMP_SAMPLES_SINCE_MIDNIGHT_HI'].$parsedXML['SPEED']['TIMESTAMP_SAMPLES_SINCE_MIDNIGHT_LO'], '0'));
                            $timestamp_sample_rate = (is_array($parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE']) ? max($parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE']) : $parsedXML['SPEED']['TIMESTAMP_SAMPLE_RATE']); // XML could possibly contain more than one TIMESTAMP_SAMPLE_RATE tag, returning as array instead of integer [why? does it make sense? perhaps doesn't matter but getID3 needs to deal with it] - see https://github.com/JamesHeinrich/getID3/issues/105                             $thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] = $samples_since_midnight / $timestamp_sample_rate;
                            $h = floor( $thisfile_riff_WAVE['iXML'][0]['timecode_seconds']       / 3600);
                            $m = floor(($thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] - ($h * 3600))      / 60);
                            $s = floor( $thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] - ($h * 3600) - ($m * 60));
                            $f =       ($thisfile_riff_WAVE['iXML'][0]['timecode_seconds'] - ($h * 3600) - ($m * 60) - $s) * $thisfile_riff_WAVE['iXML'][0]['timecode_rate'];
                            $thisfile_riff_WAVE['iXML'][0]['timecode_string']       = sprintf('%02d:%02d:%02d:%05.2f', $h, $m, $s,       $f);
                            $thisfile_riff_WAVE['iXML'][0]['timecode_string_round'] = sprintf('%02d:%02d:%02d:%02d',   $h, $m, $s, round($f));
                            unset($samples_since_midnight, $timestamp_sample_rate, $h, $m, $s, $f);
                        }
                        unset($parsedXML);
                    }

    /** * Alias for getNumber * * @param string $value Number to localize * @param array $options Options: locale, precision. See {@link setOptions()} for details. * @return float */
    public static function getFloat($input, array $options = array())
    {
        return floatval(self::getNumber($input, $options));
    }

    /** * Returns a locale formatted integer number * Alias for toNumber() * * @param string $value Number to normalize * @param array $options Options: locale, precision. See {@link setOptions()} for details. * @return string Locale formatted number */
    public static function toFloat($value, array $options = array())
    {

        if (!empty($info['quicktime']['comments']['location.ISO6709'])) {
            // https://en.wikipedia.org/wiki/ISO_6709             foreach ($info['quicktime']['comments']['location.ISO6709'] as $ISO6709string) {
                $ISO6709parsed = array('latitude'=>false, 'longitude'=>false, 'altitude'=>false);
                if (preg_match('#^([\\+\\-])([0-9]{2}|[0-9]{4}|[0-9]{6})(\\.[0-9]+)?([\\+\\-])([0-9]{3}|[0-9]{5}|[0-9]{7})(\\.[0-9]+)?(([\\+\\-])([0-9]{3}|[0-9]{5}|[0-9]{7})(\\.[0-9]+)?)?/$#', $ISO6709string, $matches)) {
                    // phpcs:ignore PHPCompatibility.Lists.AssignmentOrder.Affected                     @list($dummy, $lat_sign, $lat_deg, $lat_deg_dec, $lon_sign, $lon_deg, $lon_deg_dec, $dummy, $alt_sign, $alt_deg, $alt_deg_dec) = $matches;

                    if (strlen($lat_deg) == 2) {        // [+-]DD.D                         $ISO6709parsed['latitude'] = (($lat_sign == '-') ? -1 : 1) * floatval(ltrim($lat_deg, '0').$lat_deg_dec);
                    } elseif (strlen($lat_deg) == 4) {  // [+-]DDMM.M                         $ISO6709parsed['latitude'] = (($lat_sign == '-') ? -1 : 1) * floatval(ltrim(substr($lat_deg, 0, 2), '0')) + floatval(ltrim(substr($lat_deg, 2, 2), '0').$lat_deg_dec / 60);
                    } elseif (strlen($lat_deg) == 6) {  // [+-]DDMMSS.S                         $ISO6709parsed['latitude'] = (($lat_sign == '-') ? -1 : 1) * floatval(ltrim(substr($lat_deg, 0, 2), '0')) + floatval(ltrim(substr($lat_deg, 2, 2), '0') / 60) + floatval(ltrim(substr($lat_deg, 4, 2), '0').$lat_deg_dec / 3600);
                    }

                    if (strlen($lon_deg) == 3) {        // [+-]DDD.D                         $ISO6709parsed['longitude'] = (($lon_sign == '-') ? -1 : 1) * floatval(ltrim($lon_deg, '0').$lon_deg_dec);
                    } elseif (strlen($lon_deg) == 5) {  // [+-]DDDMM.M                         $ISO6709parsed['longitude'] = (($lon_sign == '-') ? -1 : 1) * floatval(ltrim(substr($lon_deg, 0, 2), '0')) + floatval(ltrim(substr($lon_deg, 2, 2), '0').$lon_deg_dec / 60);
                    } elseif (strlen($lon_deg) == 7) {  // [+-]DDDMMSS.S

<?php esc_html_e( 'Past six months', 'akismet' ); ?></h3> <span class="akismet-new-snapshot__number"><?php echo number_format( $stat_totals['6-months']->spam ); ?></span> <span class="akismet-new-snapshot__text"><?php echo esc_html( _n( 'Spam blocked', 'Spam blocked', $stat_totals['6-months']->spam, 'akismet' ) ); ?></span> </li> <li class="akismet-new-snapshot__item"> <h3 class="akismet-new-snapshot__header"><?php esc_html_e( 'All time', 'akismet' ); ?></h3> <span class="akismet-new-snapshot__number"><?php echo number_format( $stat_totals['all']->spam ); ?></span> <span class="akismet-new-snapshot__text"><?php echo esc_html( _n( 'Spam blocked', 'Spam blocked', $stat_totals['all']->spam, 'akismet' ) ); ?></span> </li> <li class="akismet-new-snapshot__item"> <h3 class="akismet-new-snapshot__header"><?php esc_html_e( 'Accuracy', 'akismet' ); ?></h3> <span class="akismet-new-snapshot__number"><?php echo floatval( $stat_totals['all']->accuracy ); ?>%</span> <span class="akismet-new-snapshot__text"> <?php                             /* translators: %s: number of spam missed by Akismet */
                            echo esc_html( sprintf( _n( '%s missed spam', '%s missed spam', $stat_totals['all']->missed_spam, 'akismet' ), number_format( $stat_totals['all']->missed_spam ) ) ) . ', ';
                            /* translators: %s: number of false positive spam flagged by Akismet */
                            echo esc_html( sprintf( _n( '%s false positive', '%s false positives', $stat_totals['all']->false_positives, 'akismet' ), number_format( $stat_totals['all']->false_positives ) ) );
                            ?> </span> </li> </ul> </div>

if (!isset($thisfile_id3v2['comments']['year']) && !empty($thisfile_id3v2['comments']['recording_time'][0]) && preg_match('#^([0-9]{4})#', trim($thisfile_id3v2['comments']['recording_time'][0]), $matches)) {
            $thisfile_id3v2['comments']['year'] = array($matches[1]);
        }

        if (!empty($thisfile_id3v2['TXXX'])) {
            // MediaMonkey does this, maybe others: write a blank RGAD frame, but put replay-gain adjustment values in TXXX frames             foreach ($thisfile_id3v2['TXXX'] as $txxx_array) {
                switch ($txxx_array['description']) {
                    case 'replaygain_track_gain':
                        if (empty($info['replay_gain']['track']['adjustment']) && !empty($txxx_array['data'])) {
                            $info['replay_gain']['track']['adjustment'] = floatval(trim(str_replace('dB', '', $txxx_array['data'])));
                        }
                        break;
                    case 'replaygain_track_peak':
                        if (empty($info['replay_gain']['track']['peak']) && !empty($txxx_array['data'])) {
                            $info['replay_gain']['track']['peak'] = floatval($txxx_array['data']);
                        }
                        break;
                    case 'replaygain_album_gain':
                        if (empty($info['replay_gain']['album']['adjustment']) && !empty($txxx_array['data'])) {
                            $info['replay_gain']['album']['adjustment'] = floatval(trim(str_replace('dB', '', $txxx_array['data'])));
                        }