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<?php

/*
	if('string1' == 'string1')
	{
		echo 'Strings match.';
	} 
	else 
	{
		echo 'Strings do not match.';
	}

if($str == $res)
	{
		echo 'Strings OK';
	} 
	else 
	{
		echo 'Strings error';
	}
	*/
	
	$str = "1235";
	$res = preg_replace("/[^0-9.]/", "", $str );
	echo $res;
	compare($str, $res);
	echo "";

$str = "aze";
	$res = preg_replace("/[^0-9.]/", "", $str );
	echo $res;
	compare($str, $res);
	echo "";

$str = "8.15";
	$res = preg_replace("/[^0-9.]/", "", $str );
	echo $res;
	compare($str, $res);
	echo "";

$str = "AZ9.78";
	$res = preg_replace("/[^0-9.]/", "", $str );
	echo $res;
	compare($str, $res);
	echo "";

$str = ".127.78.2.5";
	$res = preg_replace("/[^0-9.]/", "", $str );
	echo $res;
	compare($str, $res);
	echo "";

$str = ".357";
	$res = preg_replace("/[^0-9.]/", "", $str );
	echo $res;
	compare($str, $res);
	echo "";
	echo "";
	
	echo " ------- ";

echo "";
	echo "";
	$str = ".357";
	$pieces = str_split($str);
	// supprimer le point en premiére position
	if( $pieces[0] == chr(46) )
	{
		$str1 = substr($str, 1); 
		echo $str ." devient " .$str1;
		echo "";
	}

echo " ------- ";
	
	echo "";
	echo "";
	$str = "357.";
	$pieces = str_split($str);
	// supprimer le point en derniere position
	if( end($pieces) == chr(46) )
	{
		$str1 = substr($str, 0, -1); 
		echo $str ." devient " .$str1;
		echo "";
	}

echo " ------- ";
	
	echo "";
	echo "";

//plusieurs points dans la chaine

$str = ".127.78.2.5";
	$pieces = str_split($str);
	
	//.127.78.2.5

//127.78.2.5
	
	//$array = array(1, "hello", 1, "world", "hello");

echo " ---> " .$str;
	
	$resultArray = array_count_values($pieces)
	print_r(array_count_values($pieces));
	
	echo "";
	echo "";
	
	for ($x = 0; $x < count($resultArray); $x++) 
	{
		if( $resultArray[$x] == chr(46) )
		{
			echo " ----->" +$resultArray[chr46];
		}
	}

// OK

//echo preg_replace('~\D~', '', $str);

//echo "";

echo test("1235");

echo "";

echo test("aze");

echo "";

echo test("8.15");

echo "";

echo test("AZ9.78");

echo "";

echo test(".127.78.2.5");

echo "";

echo test(".357");

echo "";

$str = "A";

if( $str == chr(65) )

{

echo "Bingo";

echo " ";

}

echo preg_match("/^[a-z0-9.]+$/i", "123");

echo " ";

echo preg_match("/^[a-z0-9.]+$/i", "aze");

echo " ";

echo preg_match("/^[a-z0-9.]+$/i", "123.78");

echo " ";

echo preg_match("/^[a-z0-9.]+$/i", "12a3.Z78");

echo " ";

$str = '123454321';

$pattern = '/^[0-9]+$/';

if ( preg_match($pattern, $str) )

{

echo 'string contains only digits';

}

else

{

echo 'string does not contain only digits';

}

/*$pieces = str_split("789123");

for ($i=0; $i<count($pieces); $i++)

{

echo $pieces[$i] ." ";

if( $str != chr(48) || $str != chr(49) || $str != chr(50) || $str != chr(51) ||

$str != chr(52) || $str != chr(53) || $str != chr(54) || $str != chr(55) ||

$str != chr(56) || $str != chr(57)  )

{

echo "Probléme";

echo " ";

}

echo " ";

echo hasNumbers("123");

echo " ";

echo hasNumbers("aze");

echo " ";

echo hasNumbers("0a8kp");

echo " ";

$string = "789";

if (preg_match('~[0-9]+~', $string))

{

echo 'string with numbers';

echo " ";

}

$string = "7.89";

if (preg_match('~[0-9]+~', $string))

{

echo 'string with numbers';

echo " ";

}

$string = "a8";

if (preg_match('~[0-9]+~', $string))

{

echo 'string with numbers';

echo " ";

}

$string = "agdf";

if (preg_match('~[0-9]+~', $string))

{

echo 'string with numbers';

echo " ";

}

//echo intval("42");

//echo " ";

//echo intval("AZ");

//echo " ";

//echo intval("10.57");

$error = "78.7.21";

$tests = array(

"42",

1337,

0x539,

02471,

0b10100111001,

1337e0,

"0x539",

"02471",

"0b10100111001",

"1337e0",

"not numeric",

array(),

9.1,

$error,

null,

'',

);

foreach ($tests as $element) {

if (is_numeric($element)) {

echo var_export($element, true) . " is numeric", PHP_EOL;

} else {

echo var_export($element, true) . " is NOT numeric", PHP_EOL;

}

echo " ";

}

function compare($string1, $string2)
{
	if (strcmp($string1, $string2) == 0) 
	//if ( $string1 == $string2)  
	{
		echo 'Equal';
	}
	else
	{
		echo 'Differente';
	}
}

function hasNumbers($strValue)

{

return preg_match('/[0-9]/', $strValue); // === 1;

}

function test($val)

{

$pieces = str_split($val);

//echo "<pre>";

//print_r($pieces);

//echo "</pre>";

$count_point = substr_count($val, '.');

echo "  ----> Nb points " .$count_point ."  +++++++  ";

echo "";

/*if( $pieces[0] == chr(46) )

{

$detect_error = true;

echo " TRACE1 ";

}*/

//else

//{

//echo " TRACE2 ";

if( $count_point < 2 ) // pas de point ou 1

{

$detect_error = false;

for ($i=0; $i<count($pieces); $i++)

{

echo "---> $i " .$pieces[$i] ." ";

if( $pieces[$i] == chr(46)   )

{

$detect_error = false;

if( $i == 0 ) // erreur si on commence par un point

{

$detect_error = true;

break;

}

else if( $pieces[$i] >= chr(48) && $pieces[$i] <= chr(57) )

{

$detect_error = false;

}

else

{

$detect_error = true;

break;

}

else

{

$detect_error = true;

//$detect_error = "lulu";

//echo "fdgljqjglkfjgklfjqljqjsdl     "  .$detect_error ;

}

//}

if( $detect_error )

{

$retour = "Erreur";

}

else

{

$retour = "OK";

}

return $retour ." " .$val;

}