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# PHP is_numeric() Function [PHP Available Functions](#) The **is_numeric()** function is used to check whether a variable is a number or a numeric string. PHP Version: PHP 4, PHP 5, PHP 7 ### Syntax bool is_numeric ( mixed $var ) Parameter Description: * $var: The variable to check. ### Return Value Returns TRUE if the specified variable is a number or a numeric string, otherwise returns FALSE. Note that a float returns 1, which is TRUE. ### Example ## Example The output will be: 678 is a number a678 is not a number---------------------bool(true)[ Is 678 a number? ]---------------------bool(false)[ Is a number? ]---------------------bool(true)[ Is 698.99 a number? ]---------------------bool(false)[ Is Array a number? ]---------------------bool(true)[ Is 125689.66 a number? ] [PHP Available Functions](#)