06-25-2009
You should put the variable in {} brackets....
i.e. echo "efg"${line_count}_f"hij"
The reason is the the _ is a valid character to have in a variable name, and the whole string "line_count_f"hij" is taken as the variable name.
(and you don't need the inner quotes. They serve no purpose here.
Last edited by Scott; 06-25-2009 at 07:12 PM..
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IS_FLOAT(3) 1 IS_FLOAT(3)
is_float - Finds whether the type of a variable is float
SYNOPSIS
bool is_float (mixed $var)
DESCRIPTION
Finds whether the type of the given variable is float.
Note
To test if a variable is a number or a numeric string (such as form input, which is always a string), you must use is_numeric(3).
PARAMETERS
o $var
- The variable being evaluated.
RETURN VALUES
Returns TRUE if $var is a float, FALSE otherwise.
EXAMPLES
Example #1
is_float(3) example
<?php
if (is_float(27.25)) {
echo "is float
";
} else {
echo "is not float
";
}
var_dump(is_float('abc'));
var_dump(is_float(23));
var_dump(is_float(23.5));
var_dump(is_float(1e7)); //Scientific Notation
var_dump(is_float(true));
?>
The above example will output:
is float
bool(false)
bool(false)
bool(true)
bool(true)
bool(false)
SEE ALSO
is_bool(3), is_int(3), is_numeric(3), is_string(3), is_array(3), is_object(3).
PHP Documentation Group IS_FLOAT(3)