PHP is_double() Function

The PHP is_double() function in PHP is used to find whether the type of the specified variable is a float or not. It returns a Boolean value true if the parameter var is float else it returns false.

This function in an alias of is_float() function.

Syntax

is_ double( mixed $var )

Parameter

var(required)- This parameter represents the value to check.

Return

This function returns a Boolean value TRUE if the parameter var is a float, else it returns FALSE.

Example 1

Output

The var is Float

Example 2

Output

1232 is not a float value.

Example 3

Output

1232 is not a float value.

Related Topics

PHP array_diff_ukey() Function

The array_diff_ukey() function in PHP compares the keys from array1 against the keys from array2 and returns the difference containing all the entries from array1 that are not present in any of the other arrays. Syntax array_diff_ukey ( array $array1 , array $array2 [, array $... ], callable $key_compare_func ) Parameter array1(required)- This parameter signifies the...

1 minute read.

PHP printf() Function

PHP printf() Function The printf() function in PHP outputs a formatted string. The related functions of printf() function are as follows: sprintf()vprintf()vsprintf()fprintf()vfprintf() Syntax printf ( string $format [, mixed $... ] ) Parameter format(required)- This parameter formats the string which is composed of zero or...

1 minute read.

PHP quoted_printable_encode() Function

PHP quoted_printable_encode() Function The quoted_printable_encode() function in PHP converts a 8 bit string to a quoted-printable string. This function is similar to imap_8bit(), except this one does not require the IMAP module to work. Syntax quoted_printable_encode ( string $str ) Parameter str(required)- This parameter represents...

1 minute read.

PHP array_reverse() Function

PHP array_reverse() Function The array_reverse() function in PHP returns a new array with the elements in the reversed order. Syntax array_reverse (array $array [, bool $preserve_keys = FALSE ] ) Parameter array(required)- This parameter represents the input array preserve_keys (optional)- This parameter specifies if the function should preserve the keys...

1 minute read.

PHP sizeof() Function

PHP sizeof() Function The sizeof() function in counts all elements and return the size of the array. This function is an alias of count(). Syntax sizeof( mixed $array_or_countable [, int $mode = COUNT_NORMAL ] ) Parameter array_or_countable(required)– This parameter represents the input array or countable object. mode(optional)-...

1 minute read.

PHP rsort() Function

PHP rsort() Function The rsort () function in PHP is used to sort an array in reverse order i.e., highest to lowest. Syntax rsort ( array &$array [, int $sort_flags = SORT_REGULAR ] ) Parameter array(required)- This parameter represents the input array. sort_flags (optional)- This parameter is used to...

1 minute read.

PHP pos() Function

PHP pos() Function The pos() function in PHP returns the current element in an array which is initialized to the first element of the array. This function is an alias of current(). Syntax pos ( array...

1 minute read.

PHP prev() Function

PHP prev() Function The prev() function in PHP rewinds or moves back the internal array pointer one place backward and returns the prev array value. It behaves like next() function, except that this function rewinds the...

1 minute read.

PHP array_values() Function

PHP array_values() Function The array_values () function in PHP returns all the values from the array and indexes the array numerically. Syntax array_values ( array $array ) Parameter array(required)- This array represents the input array. Return This function returns an indexed array of values. Example 1 Output Input Array: Array ...

1 minute read.

PHP For loop with Example

For loop in PHP : The for loop is the most potent loop, it combines the abilities to set up variables as we enter the loop, test for conditions while iterating...

3 minutes read.

PHP is_iterable() Function

The is_iterable() function in PHP verifies that the contents of the specified variable is an iterable value. Syntax is_iterable ( mixed $var ) var(required)- This parameter represents the value to check. Return This function returns a Boolean value TRUE if the parameter var is iterable, else it returns...

1 minute read.

PHP array_unshift() Function

PHP array_unshift() Function The array_unshift () function in PHP prepends one or more elements to the beginning or front of an array. It returns the new number of elements in the array. Syntax array_unshift ( array &$array [, mixed $... ] ) Parameter array(required)- This array represents...

1 minute read.

PHP array_diff_assoc() Function

PHP array_diff_assoc() Function The array_diff_assoc() Function in PHP compares the difference of arrays and returns an array containing all the values from array1 that are not present in any of the other arrays. Syntax array_diff_assoc ( array $array1 , array $array2 [, array $... ] ) Parameter array1(required)- This parameter signifies...

1 minute read.

PHP is_numeric() Function

The is_numeric() function in PHP finds whether the specified variable is a number or a numeric string. It returns a Boolean value TRUE if the specified var is a number or a numeric string else it returns FALSE otherwise. Syntax is_numeric ( mixed...

1 minute read.

PHP array_uintersect_assoc() Function

PHP array_uintersect_assoc() Function The array_uintersect_uassoc() function in PHP calculates the intersection of arrays by comparing the data and indexes by separate callback functions. It returns an array containing all the values of the first input...

2 minutes read.

Python main() function

What is a main() function? In most of the programming languages, there is this one special function i.e., main() which is executed firstly everytime when we run the program. The special...

6 minutes read.

PHP strcoll() Function

PHP strcoll() Function The strcoll() function in PHP compares two strings. This function is case-sensitive but not binary-safe. It uses the current locale for doing the comparisons. Syntax strcoll ( string $str1 , string $str2 ) Parameter str1(required)- This parameter represents the first string. str2(required)- This parameter...

1 minute read.

PHP range() Function

PHP range() Function The range () function in PHP is used to create an array containing a range of elements. Syntax range ( mixed $start , mixed $end [, number $step = 1 ] ) Parameter start(required)- This parameter represents the first value of the sequence. end(required)- This parameter represents the...

1 minute read.

PHP array_intersect_uassoc() function

The array_intersect_uassoc () function in PHP is used to compute the intersection of arrays with the help of an additional index check, comparing indexes by a callable function. It returns an array containing...

1 minute read.

PHP array_change_key_case() Function

PHP array_change_key_case() Function The array_change_key_case() function in PHP is used to change the case of all keys present in the specified array. It returns an array with all keys in the specified array to lowercase or...

1 minute read.