You could take advantage of the type conversion performed by php as
demonstrated in this snippet (the trick is in multiplying $value by 1). if
you need to distinguish further between doubles and floats you can do a
regex on $value once you've established it's type:
<?php
$a[] = "1234";
$a[] = "1234.567";
$a[] = "1.234e-8";
$a[] = "3oranges";
foreach($a as $value) {
print($value.": ");
if(is_numeric($value)) {
$tmp = 1 * $value;
printf("is %s<BR>\n", gettype($tmp));
}
else print("is not a number");
}
?>
Moody
-----Original Message-----
From: Johnson, Kirk [mailto:[EMAIL PROTECTED]]
Sent: 19 March 2001 15:55
To: [EMAIL PROTECTED]
Subject: RE: [PHP] how do i get a variable type? - not that simple
Jim,
Thanks for sharing all your hard work. Have you seen checkdate()?
http://www.php.net/manual/en/function.checkdate.php
Kirk
> -----Original Message-----
> From: Ide, Jim [mailto:[EMAIL PROTECTED]]
> Sent: Monday, March 19, 2001 6:38 AM
> To: 'phpman'; [EMAIL PROTECTED]
> Subject: RE: [PHP] how do i get a variable type? - not that simple
>
>
> These are the functions I use to determine if
> a string value is a valid integer, real, date, etc.
> Hope this helps.
>
> ps - please let me know if you find any errors. thanx.
>
> <?php
>
> function IsValidBoolean($p) {
> if ( isset($p) ) {
> if ((strtolower($p) == "true") or (strtolower($p) ==
> "false")) return TRUE;
> }
> return FALSE;
> }
>
> function IsValidMemo($p) {
>
> // If $p contains any characters other than printable ascii,
> // or \r or \n, return FALSE.
>
> if (trim($p) == "") return TRUE;
> if ( ereg("[^\r\n\x20-\x7E]", $p) ) return FALSE;
> return TRUE;
> }
>
> function IsValidString($p) {
>
> // If $p contains any characters other than printable ascii,
> // return FALSE.
>
> if (trim($p) == "") return TRUE;
> if ( ereg("[^\x20-\x7E]", $p) ) return FALSE;
> return TRUE;
> }
>
> function IsValidInteger($p) {
>
> // return TRUE if:
> // 1. $p is not equal to ""
> // 2. $p consists of 1 or more digits, optionally preceded by a
> minus sign
>
> if ( isset($p) ) return ereg("^\-?[0-9]+$",$p);
> return FALSE;
> }
>
> function IsValidReal($p) {
>
> // return TRUE if:
> // 1. $p is not equal to ""
> // 2. $p begins with optional minus sign, followed by 1 or more
> digits, followed by a decimal point,
> // followed by 1 or more digits
> // 3. $p can be optionally preceded by a minus sign
>
> if ( isset($p) ) return ereg("^\-?[0-9]+\.[0-9]+$",$p);
> return FALSE;
> }
>
> function IsLeapYear($y) {
> if ( (($y % 4) == 0) && (($y % 100) != 0) || (($y % 400) == 0))
> return TRUE;
> return FALSE;
> }
>
> function IsValidDate($p) {
>
> // return TRUE if:
> // 1. $p is not equal to ""
> // 2. $p consists of 4 digits followed by minus sign,
> followed by 2
> digits, followed by
> // minus sign, followed by 2 digits
> // example 1995-02-03
>
> if ( ! isset($p) )
> return FALSE;
> if ( ! ereg("^([0-9]{4})\-([0-9]{2})\-([0-9]{2})$",$p) )
> return FALSE;
>
> $t = explode("-",$p);
> if ( count($t) != 3 ) return FALSE;
> $y = $t[0];
> $m = $t[1];
> $d = $t[2];
>
> return IsValidDate2($y,$m,$d);
> }
>
> function IsValidDate2($y,$m,$d) {
>
> if ( ($m < 1) or ($m > 12) ) return FALSE;
> if ( ($d < 1) or ($d > 31) ) return FALSE;
>
> // 30 days has sept, apr, jun, and nov (all the rest
> have 31 [except
> for feb])
> // 9 4 6 11
>
> if ( ($m == 4) or ($m == 6) or ($m == 9) or ($m == 11) ) {
> if ($d > 30) return FALSE;
> } elseif ($m == 2) {
> if ( IsLeapYear($y) ) {
> if ( $d > 29 ) return FALSE;
> } else {
> if ( $d > 28 ) return FALSE;
> }
> }
> return TRUE;
> }
>
> function IsValidTime($p) {
>
> // return TRUE if:
> // 1. $p is not equal to ""
> // 2. $p consists of 2 digits in the range 00 to 23,
> // followed by a colon,
> // followed by 2 digits in the range 00 to 59,
> // followed by a colon,
> // followed by 2 digits in the range 00 to 59.
> // example 14:45:02
>
> if ( ! isset($p) )
> return FALSE;
> if ( ! ereg("^([0-9]{2})\:([0-9]{2})\:([0-9]{2})$",$p) )
> return FALSE;
>
> $t = explode(":",$p);
> if ( count($t) != 3 ) return FALSE;
> $h = $t[0];
> $m = $t[1];
> $s = $t[2];
>
> return IsValidTime2($h,$m,$s);
> }
>
> function IsValidTime2($h,$m,$s) {
>
> if ( ($h < 0) or ($h > 23) ) return FALSE;
> if ( ($m < 0) or ($m > 59) ) return FALSE;
> if ( ($s < 0) or ($s > 59) ) return FALSE;
>
> return TRUE;
> }
>
> function IsValidDateTime($p) {
>
> // return TRUE if:
> // 1. $p is not equal to ""
> // 2. $p consists of a valid date (validated by
> IsValidDate() above)
> // followed by a space
> // followed by a valid time (validated by
> IsValidTime() above)
> // example: 1998-04-21 22:01:34
>
> if ( ! isset($p) ) return FALSE;
>
> $temp = explode(" ",$p);
> if ( count($temp) != 2 ) return FALSE;
> $d = $temp[0];
> $t = $temp[1];
> if ( ! IsValidDate($d) ) return FALSE;
> if ( ! IsValidTime($t) ) return FALSE;
>
> return TRUE;
> }
>
> function IsValidTimeStamp($p) {
>
> // return TRUE if:
> // 1. $p is not equal to ""
> // 2. $p consists of a datetime in YYYYMMDDHHMMSS format
> // example: 19980421220134
>
> if ( ! isset($p) ) return FALSE;
> if ( ! ereg("^([0-9]{14})$",$p) ) return FALSE;
>
> $y = substr($p,0,4);
> $m = substr($p,4,2);
> $d = substr($p,6,2);
> $h = substr($p,8,2);
> $min = substr($p,10,2);
> $s = substr($p,12,2);
>
> if ( ! IsValidDate2($y,$m,$d) ) return FALSE;
> if ( ! IsValidTime2($h,$min,$s) ) return FALSE;
>
> return TRUE;
> }
>
> function TestVF($type,$fn,$v,$p) {
>
> // TestVF = TestValidationFunction
>
> // example 1:
> TestVF("integer","IsValidInteger",TRUE,"15"); //
> ok, 15 is a valid integer, so print nothing
> // example 2:
> TestVF("integer","IsValidInteger",FALSE,"15"); //
> error, 15 *is* a valid integer, so print error
> // example 3:
> TestVF("integer","IsValidInteger",FALSE,"abc"); //
> ok, "abc" is NOT a valid integer, so print nothing
> // example 4:
> TestVF("integer","IsValidInteger",TRUE,"abc"); //
> error, "abc" is NOT a valid integer, so print error
>
> $IsValid = $fn($p);
> if ( $v ) {
> if ( $IsValid ) return;
> echo "error, is NOT a valid $type: " . $p . "<BR>\n";
> } else {
> if ( ! $IsValid ) return;
> echo "error, *is* a valid $type: " . $p . "<BR>\n";
> }
> }
>
> function TestDatesNumbers() {
>
> echo "The test is sucessful if nothing else gets printed below
> this.<BR>\n";
>
> // x1F = cc
> // x20 = space
> // x21 = !
> // ...
> // x7D = }
> // x7E = ~
> // x7F = cc
>
> TestVF("string","IsValidString",TRUE, "");
> TestVF("string","IsValidString",TRUE, "asdfasdf");
> TestVF("string","IsValidString",FALSE, "asdf\nasdf");
> // contains \n
> TestVF("string","IsValidString",FALSE, "abcd" . chr(0)
> . "asdf");
> // contains chr(0)
> TestVF("string","IsValidString",FALSE, "abcd\x1Fasdf");
> // contains cc
> TestVF("string","IsValidString",TRUE, "abcd asdf");
> TestVF("string","IsValidString",TRUE, "abcd~asdf");
> TestVF("string","IsValidString",FALSE, "abcd\x7Fasdf");
> // contains cc
>
> TestVF("memo","IsValidMemo",TRUE, "");
> TestVF("memo","IsValidMemo",TRUE, "asdfasdf");
> TestVF("memo","IsValidMemo",TRUE, "asdf\nasdf");
> TestVF("memo","IsValidMemo",TRUE, "asdf\rasdf");
> TestVF("memo","IsValidMemo",TRUE, "asdf\r\nnasdf");
> TestVF("memo","IsValidMemo",FALSE, "abcd" . chr(0)
> . "asdf");
> // contains chr(0)
> TestVF("memo","IsValidMemo",FALSE, "abcd\x1Fasdf");
> // contains cc
> TestVF("memo","IsValidMemo",TRUE, "abcd asdf");
> TestVF("memo","IsValidMemo",TRUE, "abcd~asdf");
> TestVF("memo","IsValidMemo",FALSE, "abcd\x7Fasdf");
> // contains cc
>
> // digits / 0-9 :
>
> TestVF("integer","IsValidInteger",FALSE, "");
> //
> blank
> TestVF("integer","IsValidInteger",TRUE, "0");
> TestVF("integer","IsValidInteger",FALSE, " 0");
> //
> leading space not allowed
> TestVF("integer","IsValidInteger",FALSE, "+0");
> //
> plus sign not allowed
> TestVF("integer","IsValidInteger",TRUE, "-0");
> TestVF("integer","IsValidInteger",FALSE, "0+");
> //
> trailing plus sign not allowed
> TestVF("integer","IsValidInteger",FALSE, "0-");
> //
> trailing minus sign not allowed
> TestVF("integer","IsValidInteger",TRUE, "1");
> TestVF("integer","IsValidInteger",FALSE, "+1");
> //
> plus sign not allowed
> TestVF("integer","IsValidInteger",TRUE, "-1");
> TestVF("integer","IsValidInteger",FALSE, "1+");
> //
> trailing plus sign not allowed
> TestVF("integer","IsValidInteger",FALSE, "1-");
> //
> trailing minus sign not allowed
> TestVF("integer","IsValidInteger",TRUE, "11");
> TestVF("integer","IsValidInteger",FALSE, "+11");
> //
> plus sign not allowed
> TestVF("integer","IsValidInteger",TRUE, "-11");
> TestVF("integer","IsValidInteger",FALSE, "11+");
> //
> trailing plus sign not allowed
> TestVF("integer","IsValidInteger",FALSE, "11-");
> //
> trailing minus sign not allowed
> TestVF("integer","IsValidInteger",FALSE, "+-1");
> //
> plus sign not allowed
> TestVF("integer","IsValidInteger",FALSE, "-+1");
> //
> plus sign not allowed
> TestVF("integer","IsValidInteger",FALSE, "1+-");
> //
> plus sign not allowed
> TestVF("integer","IsValidInteger",FALSE, "1-+");
> //
> plus sign not allowed
> TestVF("integer","IsValidInteger",FALSE, "1+1");
> //
> plus sign not allowed
> TestVF("integer","IsValidInteger",FALSE, "1-1");
> //
> minus sign must be leftmost character
> TestVF("integer","IsValidInteger",FALSE, "1o1");
> // o
> not allowed
> TestVF("integer","IsValidInteger",TRUE,
> "243095230982340982360923460972362356236");
> TestVF("integer","IsValidInteger",TRUE,
> "-243095230982340982360923460972362356236");
> TestVF("integer","IsValidInteger",FALSE, "
> -243095230982340982360923460972362356236"); // leading
> space not allowed
> TestVF("integer","IsValidInteger",FALSE,
> "3214532.43"); //
> decimal point not allowed in an integer
> TestVF("integer","IsValidInteger",FALSE, "/32");
> //
> contains /
> TestVF("integer","IsValidInteger",TRUE, "0");
> TestVF("integer","IsValidInteger",TRUE, "9");
> TestVF("integer","IsValidInteger",FALSE, ":");
> //
> contains :
>
> TestVF("real","IsValidReal",FALSE, ""); // blank
> TestVF("real","IsValidReal",FALSE, "0"); // no
> decimal point
> TestVF("real","IsValidReal",FALSE, "1"); // no
> decimal point
> TestVF("real","IsValidReal",TRUE, "1.1");
> TestVF("real","IsValidReal",FALSE, "1.");
> // no digit
> to the right of decimal point
> TestVF("real","IsValidReal",FALSE, ".1");
> // no digit
> to the left of decimal point
> TestVF("real","IsValidReal",FALSE, "-1"); // no
> decimal point
> TestVF("real","IsValidReal",TRUE, "-1.1");
> TestVF("real","IsValidReal",FALSE, " -1.1");
> // leading
> space not allowed
>
> TestVF("date","IsValidDate",FALSE, ""); // blank
> TestVF("date","IsValidDate",TRUE, "2000-05-24");
> TestVF("date","IsValidDate",FALSE, "sdghsdh");
> // contains
> alpha characters
> TestVF("date","IsValidDate",FALSE, "4/5/98");
> // contains
> slashes
> TestVF("date","IsValidDate",FALSE, "2000-9-7"); // not
> YYYY-MM-DD format
> TestVF("date","IsValidDate",TRUE, "2000-09-07");
> TestVF("date","IsValidDate",FALSE, "2000-09-31");
> // 30 days
> has september
> TestVF("date","IsValidDate",FALSE, "2000-09-00");
> // day must
> be 01 thru 31
> TestVF("date","IsValidDate",FALSE, "2000-19-07"); // month
> must be 01 thru 12
> TestVF("date","IsValidDate",FALSE, "2000-00-00");
> // non-valid
> month and day
> TestVF("date","IsValidDate",FALSE, "2000-01-32");
> // day must
> be 01 thru 31
> TestVF("date","IsValidDate",TRUE, "2000-02-28");
> TestVF("date","IsValidDate",TRUE, "2000-02-29");
> TestVF("date","IsValidDate",FALSE, "2000-02-30");
> // days in
> feb must be 01 thru 29
> TestVF("date","IsValidDate",TRUE, "1999-02-28");
> TestVF("date","IsValidDate",FALSE, "1999-02-29");
> // 1999 was
> not a leap year
> TestVF("date","IsValidDate",FALSE, "1999-02-30");
> // days in
> feb must be 01 thru 29
>
> TestVF("time","IsValidTime",FALSE, ""); // blank
> TestVF("time","IsValidTime",TRUE, "20:05:24");
> TestVF("time","IsValidTime",FALSE, "sdghsdh");
> // contains
> alpha characters
> TestVF("time","IsValidTime",FALSE, "4/5/98");
> // contains
> slashes
> TestVF("time","IsValidTime",FALSE, "20:9:7"); // not
> HH:MM:SS format
> TestVF("time","IsValidTime",TRUE, "20:09:07");
> TestVF("time","IsValidTime",FALSE, "24:09:07");
> // hour must
> be 00 thru 23
> TestVF("time","IsValidTime",FALSE, "20:60:07");
> // minute
> must be 00 thru 59
> TestVF("time","IsValidTime",FALSE, "20:07:60");
> // second
> must be 00 thru 59
>
> TestVF("datetime","IsValidDateTime",FALSE, "");
> // blank
> TestVF("datetime","IsValidDateTime",TRUE, "2000-06-06
> 20:05:24");
> TestVF("datetime","IsValidDateTime",FALSE, "2000-06-06
> 20:05:24"); // 2 spaces between date and time
> TestVF("datetime","IsValidDateTime",FALSE,
> "2000-06-0620:05:24"); // 0 spaces between
> date and time
> TestVF("datetime","IsValidDateTime",FALSE, "2000-06-6
> 20:05:24"); // non-valid date format
> TestVF("datetime","IsValidDateTime",FALSE, "2000-06-06
> 20:5:24"); // non-valid time format
> TestVF("datetime","IsValidDateTime",FALSE, "2000-06-06");
> // time missing
> TestVF("datetime","IsValidDateTime",FALSE, "20:05:24");
> // date missing
> TestVF("datetime","IsValidDateTime",FALSE, "20:05:24
> 2000-06-06"); // date and time order reversed
>
> TestVF("timestamp","IsValidTimeStamp",FALSE, "");
> // blank
> TestVF("timestamp","IsValidTimeStamp",TRUE,
> "20000606200524");
> TestVF("timestamp","IsValidTimeStamp",FALSE,
> "2000066200524");
> // non-valid date format
> TestVF("timestamp","IsValidTimeStamp",FALSE,
> "2000060620524");
> // non-valid time format
> TestVF("timestamp","IsValidTimeStamp",FALSE, "20000606");
> // time missing
> TestVF("timestamp","IsValidTimeStamp",FALSE, "200524");
> // date missing
> TestVF("timestamp","IsValidTimeStamp",FALSE,
> "20052420000606");
> // date and time order reversed
>
> TestVF("boolean","IsValidBoolean",FALSE, "");
> //
> blank
> TestVF("boolean","IsValidBoolean",TRUE, "true");
> TestVF("boolean","IsValidBoolean",TRUE, "false");
> TestVF("boolean","IsValidBoolean",TRUE, "TRUE");
> TestVF("boolean","IsValidBoolean",TRUE, "FALSE");
> TestVF("boolean","IsValidBoolean",FALSE, "t");
> //
> must be 'true' or 'false'
> TestVF("boolean","IsValidBoolean",FALSE, "f");
> //
> ditto
> TestVF("boolean","IsValidBoolean",FALSE, "0");
> //
> ditto
> TestVF("boolean","IsValidBoolean",FALSE, "1");
> //
> ditto
>
> // uncomment the next 2 to test TestVF()
> // TestVF("boolean","IsValidBoolean",TRUE, "1");
> //
> ditto
> // TestVF("boolean","IsValidBoolean",FALSE,
> "true"); //
> ditto
>
> echo "done testing.\n";
> }
>
> TestDatesNumbers();
>
> ?>
>
>
>
> -----Original Message-----
> From: phpman [mailto:[EMAIL PROTECTED]]
> Sent: Sunday, March 18, 2001 1:44 PM
> To: [EMAIL PROTECTED]
> Subject: [PHP] how do i get a variable type? - not that simple
>
>
> No guys. that doesn't work. Take this code for example...
>
> $a="3";
> echo(gettype($a));
>
> this returns string
> i need to find it as an integer or real or float for the sql.
> which by the
> way is MySQL.
>
> thank you for responding, but I already know that gettype and
> all the other
> is_* don't work for this.
>
>
>
> ""phpman"" <[EMAIL PROTECTED]> wrote in message
> 99132e$ol8$[EMAIL PROTECTED]">news:99132e$ol8$[EMAIL PROTECTED]...
> > hello all,
> >
> > let's say i have this:
> > $a="varone=hello world|vartwo=2.44|varthree=100|";
> >
> > now i do this:
> >
> > $b=explode('|',$a);
> > $z=count($b);
> > for ($x=0;$x<$z;$x++) {
> > $tmp=explode('=',$b[$x]);
> > ....
> >
> > and i want to find out if $tmp[1] is a string or an integer (that's
> really
> > all I need to determine so i can put
> > together an SQL statement that puts single quotes around
> strings and none
> > around integers). Obviously
> > i won't know at design time all of the variables and their
> values. Thank
> > you.
> >
> > -dave
> >
> >
> >
> > --
> > PHP General Mailing List (http://www.php.net/)
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> > To contact the list administrators, e-mail:
> [EMAIL PROTECTED]
> >
>
>
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
> To contact the list administrators, e-mail:
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>
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