Edit report at https://bugs.php.net/bug.php?id=65418&edit=1
ID: 65418
Comment by: cmbecker69 at gmx dot de
Reported by: brucewlee at verizon dot net
Summary: Neither is_numeric() nor intval() recognize '0b...'
strings.
Status: Open
Type: Bug
Package: Scripting Engine problem
Operating System: Irrelevant
PHP Version: 5.4.0 and later
Block user comment: N
Private report: N
New Comment:
This is a duplicate of <https://bugs.php.net/bug.php?id=64877>
Previous Comments:
------------------------------------------------------------------------
[2013-08-08 05:31:27] [email protected]
This is actually a scripting engine problem. Both is_numeric() and intval() end
up calling function that defined in Zend/zend_operators.c. Responsive functions
are not treat binary strings as integer string.
is_numeric() calls
static inline zend_uchar is_numeric_string_ex(const char *str, int length, long
*lval, double *dval, int allow_errors, int *oflow_info)
inval() calls
ZEND_API void convert_to_long_base(zval *op, int base) /* {{{ */
....
case IS_STRING:
{
char *strval = Z_STRVAL_P(op);
Z_LVAL_P(op) = strtol(strval, NULL, base);
STR_FREE(strval);
}
break;
------------------------------------------------------------------------
[2013-08-08 05:11:50] [email protected]
binary format was introduced from 5.4.0.
------------------------------------------------------------------------
[2013-08-08 04:36:33] brucewlee at verizon dot net
Description:
------------
Neither is_numeric() nor intval() recognize '0b...' strings.
Test script:
---------------
Code:
$as = array("0x10", "16", "020", "0b10000");
foreach($as as $v) {
echo "The function is_numeric('" . $v . "') returns ";
if (is_numeric($v)) { echo("true"); } else { echo("false"); };
echo ".<br>";
}
Output:
The function is_numeric('0x10') returns true.
The function is_numeric('16') returns true.
The function is_numeric('020') returns true.
The function is_numeric('0b10000') returns false.
Code:
$as = array(["0x10", 16], ["16", 10], ["020", 8], ["0b10000", 2]);
foreach($as as $v) {
echo "The function intval('" . $v[0] . "', " . $v[1] . ") returns " .
intval($v[0], $v[1]) . ".<br>";
}
Output:
The function intval('0x10', 16) returns 16.
The function intval('16', 10) returns 16.
The function intval('020', 8) returns 16.
The function intval('0b10000', 2) returns 0.
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=65418&edit=1
