Finds whether a variable is a needed type in PHP

checkVariableType.php

<?php
/**
 * Finds whether a variable is a unsigned float or a numeric string.
 * Sometimes, we need to have no letters in the number and is_numeric does not quit the job.
 * @param string The variable being evaluated.
 * @link   http://php.net/manual/en/function.is-numeric.php#47491
 * @return 1|emptystring It returns 1 if okay and returns nothing "" if it's bad number formating
 * @since  11/6/14 11:15 AM
 */
function isUnsignedFloat($val) {
    $val = str_replace(" ", "", trim($val));

    return preg_match("/^([0-9])+([\.|,]([0-9])*)?$/i", $val);
}

/**
 * Finds whether a variable is a unsigned integer or a numeric string.
 * Sometimes, we need to have no letters in the number and is_numeric does not quit the job.
 * @param string The variable being evaluated.
 * @link   http://php.net/manual/en/function.is-numeric.php#47491
 * @return 1|emptystring It returns 1 if okay and returns nothing "" if it's bad number formating
 * @since  11/6/14 11:15 AM
 */
function isUnsignedInteger($val) {
    $val = str_replace(" ", "", trim($val));

    return preg_match("/^([0-9])+$/i", $val);
}

/**
 * Finds whether a variable is a signed float or a numeric string.
 * Sometimes, we need to have no letters in the number and is_numeric does not quit the job.
 * @param string The variable being evaluated.
 * @link   http://php.net/manual/en/function.is-numeric.php#47491
 * @return 1|emptystring It returns 1 if okay and returns nothing "" if it's bad number formating
 * @since  11/6/14 11:15 AM
 */
function isSignedFloat($val) {
    $val = str_replace(" ", "", trim($val));

    return preg_match("/^-?([0-9])+([\.|,]([0-9])*)?$/i", $val);
}

/**
 * Finds whether a variable is a signed integer or a numeric string.
 * Sometimes, we need to have no letters in the number and is_numeric does not quit the job.
 * @param string The variable being evaluated.
 * @link   http://php.net/manual/en/function.is-numeric.php#47491
 * @return 1|emptystring It returns 1 if okay and returns nothing "" if it's bad number formating
 * @since  11/6/14 11:15 AM
 */
function isSignedInteger($val) {
    $val = str_replace(" ", "", trim($val));

    return preg_match("/^-?([0-9])+$/i", $val);
}

/**
 * Finds whether a variable is a float or a numeric string.
 * Sometimes, we need to have no letters in the number and is_numeric does not quit the job.
 * @param string The variable being evaluated.
 * @link   http://php.net/manual/en/function.is-numeric.php#47491
 * @return 1|emptystring It returns 1 if okay and returns nothing "" if it's bad number formating
 * @since  11/6/14 11:15 AM
 */
function isFloat($val) {
    $val = str_replace(" ", "", trim($val));

    return preg_match("/^([0-9])+([\.|,]([0-9])*)?$/i", $val) || preg_match("/^-?([0-9])+([\.|,]([0-9])*)?$/i",
                                                                            $val);
}

/**
 * Finds whether a variable is a integer or a numeric string.
 * Sometimes, we need to have no letters in the number and is_numeric does not quit the job.
 * @param string The variable being evaluated.
 * @link   http://php.net/manual/en/function.is-numeric.php#47491
 * @return 1|emptystring It returns 1 if okay and returns nothing "" if it's bad number formating
 * @since  11/6/14 11:15 AM
 */
function isInteger($val) {
    $val = str_replace(" ", "", trim($val));

    return preg_match("/^([0-9])+$/i", $val) || preg_match("/^-?([0-9])+$/i", $val);
}