second letter of a text field

[webdevdea]

 I know the problem is here

I cant understand what to put in there to get the value of the second character when something is typed into the text field

also how could I acces the value of $str in my print statement?

Please and thank you ..

echo substr($str, 3,-1); 

f (filter_has_var(INPUT_POST, "color")) {
  
  //work with the form
      		$color = filter_input(INPUT_POST, "color");
      		$str = filter_input(INPUT_POST, "color"); 
echo substr($str, 3,-1);

      		  print"<h2>
Your word was $color  </h2>";

[Psycho]

Did you read the manual for substr()? It's pretty straightforward for what you want.

substr($str, 1, 1);

The first number represent the index of the character yuo want to start at (first character is at index 0, so the 2nd is at index 1). The second number represents the number of characters you want to obtain.

Edited July 13, 2013 by Psycho

[kicken]

For single character access, you can also just treat the string as an array an index into it:

$secondChar = $str[1];  //0-based

[Irate]

To add more to the above method kicken provided, strings should be immutable "objects", means that you can read their value like an array, but you cannot set the index to something else.

 

Example.

 

<?php
$str = "This is an example string.";
$splitstr = $str[0]; // "T"
$str[0] = "D"; // fails
echo($str[0]); // still displays "T"
?>

[kicken]

To add more to the above method kicken provided, strings should be immutable "objects", means that you can read their value like an array, but you cannot set the index to something else.

Whether they should be immutable or not is debatable. The fact is that they are not however, you can change individual characters through array access.

<?php
$str = 'Blah';
var_dump($str[1]);
//string(1) "l"

$str[1] = 'a';
var_dump($str[1], $str);
//string(1) "a"
//string(4) "Baah"