Logo

PHP boolval() Function

PHP boolval() Function

The boolval() function in PHP is used to give the Boolean value for a given variable.

Syntax

boolval ( mixed $var )

Parameter

var(required)- This parameter represents the value that is converted to a boolean. It can be a string type, integer type etc.

Return

This function returns the boolean value for the parameter var. The Boolean value is evaluated based on the following conditions:

  • if $var is evaluated to boolean true it will return TRUE.
  • if $var is evaluated to boolean false it will return FALSE.

Example 1

Output

0.0 will return:      false
12  will return:      true
0   will return:      false

Example 2

Output

4.2 will return :      true
""  will return :      false

Example 3

Output

"PHP": true
"10":  true
"11":  true

Example 4

Output

[11, 12]:   true
[]      :   false
stdClass:   true

Related Topics

PHP is_integer() Function

The PHP is_integer() function in PHP is used to  find whether a variable is an integer or not. It returns a Boolean value true if the parameter var is integer else it returns...

1 minute read.

PHP krsort() Function

PHP krsort() Function The krsort() function in PHP sorts an array by key in reverse order while maintaining the keys. Syntax krsort (array & $array[,int $sort_flags= SORT_REGULAR] ) Parameter array(required)- This parameter represents the input array. sort_flags(optional)- This...

3 minutes read.

PHP unset() Function

PHP unset() Function The unset() function in PHP is used to unset a given variable. This function destroys the specified variables. If this function is called inside any user-defined function, then it unsets the value associated with...

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 asort() function

PHP asort() function The asort() function in PHP is used to sort an array while maintaining the index association. Syntax asort ( array &$array [, int $sort_flags = SORT_REGULAR ] )  array(required)- This parameter represents the input array to sort. sort_flags (optional)- This parameter is used to...

1 minute read.

PHP echo() Function

PHP echo() Function The echo() function in PHP outputs or displays one or more strings. The major differences between print() function and echo() function is that echo accepts an argument list and doesn't have a return value. Also, it is slightly...

1 minute read.

PHP quotemeta() Function

PHP quotemeta() Function The quotemeta() function in PHP quotes the meta characters and returns a string with a backslash character (\) before some predefine characters. The predefined characters are as follows: period ...

1 minute read.

PHP array_multisort() Function

PHP array_multisort () Function The array_multisort() function in PHP sorts multiple or multi-dimensional arrays at once. Syntax array_multisort ( array &$array1 [, mixed $array1_sort_order [, mixed $array1_sort_flags [, mixed $... ]]] ) Parameter array1(required)- This parameter specified the input array to sort. array1_sort_order(optional)- This parameter specifies the order (ascending or descending)...

1 minute read.

How to use Date and Time in PHP

HOW TO USE DATE AND TIME IN PHP: PHP time and date function  informs us about current date and time. it can be manipulated also. How time() function works: The time() function...

2 minutes read.

PHP compact() function

PHP compact() function The compact() function in PHP is used to create an array containing variables and their values. It returns the output array whose keys are the variable names, and their corresponding values are...

1 minute read.

PHP vsprintf() Function

PHP vsprintf() Function The vsprintf() function in PHP returns a formatted string. This function accepts an array of arguments. Syntax vsprintf ( string $format , array $args ) Parameter format(required)- This parameter specifies the string and how to format the variables in it. The conversion specification of this parameter...

3 minutes read.

PHP array_merge() Function

PHP array_merge() Function The array_merger() Function in PHP merges the elements of one or more arrays wherein the values of one are appended to the end of the previous one. It returns the resulting array...

1 minute read.

PHP array_pad() Function

PHP array_pad() Function The array_pad() function in PHP pads the array to the given length and value and returns a copy of the array padded to size and value specified by size and value parameter. The padding takes place as...

1 minute read.

PHP array_key_exists() function

The array_key_exists () function in PHP is used to check whether the specified key exists in the array or not. It returns a Boolean value TRUE if the given key exists else it returns FALSE. Syntax array_key_exists(mixed key,array$array) Parameter key(required)- This...

1 minute read.

PHP array_merge_recursive() Function

PHP array_merge_recursive() Function The array_merge_recursive() function  in PHP merges the elements of one or arrays together and returns the resulting array. Syntax array_merge_recursive (array $array  , [ array $... ] ) Parameter array(required)- This parameter specifies the input array ….(optional)- It represents more arrays to...

1 minute read.

PHP array_column() Function

PHP array_column() Function The array_column() function in PHP is used to return the values from a single column specified in the input array. Syntax array_column (array $input, mixed $column_key [, mixed $index_key]) Parameter input(required)- This parameter represents a multi-dimensional array or an array of...

1 minute read.

PHP While Loop

PHP while loop is used to run the same block of code until a condition is met. It should be used if number of iteration it not known. Syntax: <?php while (condition){   //Code...

1 minute read.

PHP usort() Function

PHP usort() Function The usort() function in PHP sorts  array by values using a user-defined comparison function. Syntax usort ( array &$array , callable $value_compare_func ) array(required)- This parameter represents the input array. value_compare_func(required)- This parameter represents a string that describe a callable comparison function. The comparison...

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.

Composer Installation

Composer is an application-level package manager for the PHP Programming language. The development began in April 2011 and it was first released on March 1, 2012. Commands: require install update remove Installation:  Download the installer by visiting...

1 minute read.