php is integer



php is integer

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boolval · debug_​zval_​dump · doubleval · empty · floatval · get_​defined_​vars · get_​resource_​type · gettype · import_​request_​variables · intval · is_​array · is_​bool · is_​callable · is_​double · is_​float · is_​int · is_​integer · is_​iterable · is_​long · is_​null · is_​numeric · is_​object · is_​real · is_​resource 

php is integer

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simon neaves was close on explaining why his function is perfect choice for testing for an int (as possibly most people would need). he made some errors on his ctype_digit() output though possibly a typo, or maybe a bug in his version of php at the time. the correct output for parts of his examples should be: <?php

php is integer

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current "best answer" is not correct.. using is_numeric() for checking if a variable is an integer is a bad idea. this function will send true for . for example. it's not the expected behavior. to do this correctly, you can use one of these options : considering this variables array : $variables = [ "test " =>  

php is integer

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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 is integer

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copy the following chunk of code into a php file and run it. you'll be surprised at the outcome: $t = ""; if( is_int($t ) ) { echo $t . " is an int!"; } else { echo $t . " is not an int!"; }. the problem is that is_int() thinks a string of numbers is a string, not an integer. the is_int() man page has an example illustrating 

php is integer

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the is_numeric() function in the php programming language is used to evaluate whether a value is a number or numeric string. numeric strings contain any number of digits, optional signs such as or , an optional decimal, and an optional exponential. therefore, .e is a valid numeric string.

php is integer

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definition and usage. the filter_validate_int filter is used to validate value as integer. filter_validate_int also allows us to specify a range for the integer variable. possible options and flags: min_range specifies the minimum integer value; max_range specifies the maximum integer value 

php is integer

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php data types. variables can store data of different types, and different data types can do different things. php supports the following data types: string; integer; float (floating point numbers also called double); boolean; array; object; null; resource 

php is integer

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. . . . . . . . . . . <?php. check if expression is positive integer. . param $str. return bool. function is_positive_integer( $str ) {. return ( is_numeric ( $str ) && $str > && $str == round ( $str ));. } ?> 

php is integer

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consider this simple task: you receive a variable from an unknown source (form, database, etc) that must absolutely be a valid integer. it can be a positive or negative integer and be stored in a string or an int, but it must be a real integer number made of digits. this is our checklist: validates integers only