Check if not number php
(PHP 4, PHP 5, PHP 7, PHP 8) Show is_numeric — Finds whether a variable is a number or a numeric string Descriptionis_numeric(mixed Parametersvalue The variable being evaluated. Return Values Returns Changelog
ExamplesExample #1 is_numeric() examples
$tests as $element) { The above example will output: '42' is numeric 1337 is numeric 1337 is numeric 1337 is numeric 1337 is numeric 1337.0 is numeric '0x539' is NOT numeric '02471' is numeric '0b10100111001' is NOT numeric '1337e0' is numeric 'not numeric' is NOT numeric array ( ) is NOT numeric 9.1 is numeric NULL is NOT numeric '' is NOT numeric Example #2 is_numeric() with whitespace
$tests as $element) { Output of the above example in PHP 8: ' 42' is numeric '42 ' is numeric ' 9001' is NOT numeric '9001 ' is NOT numeric Output of the above example in PHP 7: ' 42' is numeric '42 ' is NOT numeric ' 9001' is NOT numeric '9001 ' is NOT numeric See Also
sobolanx at gmail dot com ¶ 11 years ago
moskalyuk at gmail dot com ¶ 16 years ago
ben at chico dot com ¶ 8 years ago
kouber at saparev dot com ¶ 18 years ago
Magnus Deininger, dma05 at web dot de ¶ 13 years ago
What is not numeric in PHP?The is_numeric() function is an inbuilt function in PHP which is used to check whether a variable passed in function as a parameter is a number or a numeric string or not. The function returns a boolean value.
Is numeric or INT PHP?The key difference between these two functions is that is_int() checks the type of variable, while is_numeric() checks the value of the variable. $var = "123"; $var is a string of numbers, not an integer value.
Is numeric array PHP?Numeric arrays allow us to store multiple values of the same data type in a single variable without having to create separate variables for each value. These values can then be accessed using an index which in case of numeric arrays is always a number. Note: By default the index always starts at zero.
Is 0 an INT PHP?PHP converts the string to an int, which is 0 (as it doesn't contain any number representation).
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