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I am trying this out, but am unable to store large value
$var = rand(100000000000000,999999999999999);
echo $var; // prints a 9 digit value(largest possible)
How to get a desired value ?
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An "integer" can hold the value of a "long", since they're not really the same as in Java. PHP stores numbers as integers or floats, where the size of the integer is platform dependent (but usally 32 bit, signed). If you need to represent a larger number you should use the BC Math functions.
2 Answers. To elaborate on what AgentConundrum said, there isn't a need to cast an integer to a long in PHP. PHP is a dynamic language which means that generally, for operations on fundamental types, there is no need for casting (unless it is for some explicit purpose - i.e. a float to an integer), as PHP handles it for you.
The size of an integer is platform-dependent, although a maximum value of about two billion is the usual value (that's 32 bits signed). 64-bit platforms usually have a maximum value of about 9E18, except on Windows prior to PHP 7, where it was always 32 bit. PHP does not support unsigned integer s.
It looks easy at first because PHP provides automatic type conversion. For example, you can assign an integer value to a variable, and the type of that variable will be an integer. On the next line, you can assign a string to the same variable, and the type will change to a string.
From the manual:
The size of an integer is platform-dependent, although a maximum value of about two billion is the usual value (that's 32 bits signed). 64-bit platforms usually have a maximum value of about 9E18. PHP does not support unsigned integers. Integer size can be determined using the constant PHP_INT_SIZE, and maximum value using the constant PHP_INT_MAX since PHP 4.4.0 and PHP 5.0.5.
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If PHP encounters a number beyond the bounds of the integer type, it will be interpreted as a float instead. Also, an operation which results in a number beyond the bounds of the integer type will return a float instead.
BC Math and GMP are the (only?) way to manipulate this limitation.
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PHP ints are typically 32 bits. Other packages provide higher-precision ints: http://php.net/manual/en/language.types.integer.php
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