PHP: is_integer() function


The is_integer() function is used to test whether the type of the specified variable is an integer or not. This function is an alias of is_int().


(PHP 4 and above)




Name Description Required /
var_name The variable being checked Required Mixed*

*Mixed : Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value:

TRUE if var_name is an integer, FALSE otherwise.

Value Type: Boolean


if (is_integer($var_name1))
echo "$var_name1 is Integer<br>" ;
echo "$var_name1 is not an Integer<br>" ;
if (is_integer($var_name2))
echo "$var_name2 is Integer<br>" ;
echo "$var_name2 is not Integer<br>" ;
echo "[ $var_name3 is Integer? ]" .var_dump($result)."<br>";
echo "[ $var_name4 is Integer? ]" .var_dump($result)."<br>";
echo "[ $var_name5 is Integer? ]" .var_dump($result)."<br>";
echo "[ $var_name6 is Integer? ]" .var_dump($result)."<br>";
echo "[ $var_name7 is Integer? ]" .var_dump($result);


678 is Integer
a678 is not Integer
bool(false)  [ 678 is Integer? ]
bool(true)  [ 999 is Integer? ]
bool(false)  [ 698.99 is Integer? ]
bool(false)  [ Array is Integer? ]
bool(false)  [ 125689.66 is Integer? ]

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Practice here online :

See also

PHP Function Reference

Previous: is_int
Next: is_long

PHP: Tips of the Day

PHP - how to create a newline character?

Only double quoted strings interpret the escape sequences \r and \n as '0x0D' and '0x0A' respectively, so you want:


Single quoted strings, on the other hand, only know the escape sequences \\ and \'.

So unless you concatenate the single quoted string with a line break generated elsewhere (e. g., using double quoted string "\r\n" or using chr function chr(0x0D).chr(0x0A)), the only other way to have a line break within a single quoted string is to literally type it with your editor:

$s = 'some text before the line break
some text after';

Make sure to check your editor for its line break settings if you require some specific character sequence (\r\n for example).

Ref : https://bit.ly/3hcyege