CODEWITHSUNDEEP
php
Kingsley
Kingsley

Reputation: 404

How to convert string to symbol in PHP

How to convert a password string to specified symbol like * or something else.

I'm currently working on change password page. I would like to display the password to page, and i want to avoid the password overlook by someone, so i want to covert the password's string to symbol like * with same lengths. An example like <input type="password" />.

Sorry for my bad english...

Upvotes: 3

Views: 4817

Answers (6)

DaveRandom
DaveRandom

Reputation: 88677

While there are many answers here demonstrating the user of str_repeat(), I sort of doubt that is what you want. After all, any idiot can pad a string with a character, and there would be little point in doing so when one can simply use, as you rightly pointed out, <input type="password" /> (yes, you could still go get the password from the source code, but then why bother populating an obfuscated field at all? Or not just populating it with a static fixed number of * characters?).

I suspect you are looking for something more like this:

<?php

  $thePassword = "thisIsMyPassword";

?>

<input type="text" id="input_user_types_in" value="<?php echo str_repeat('*', strlen($thePassword)); ?>" />
<input type="hidden" id="value_to_post_back" name="value_to_post_back" value="<?php echo $thePassword; ?>" />

<script type="text/javascript">

  var textInput = document.getElementById('input_user_types_in');
  var hiddenInput = document.getElementById('value_to_post_back');

  textInput.onfocus = function() {
    this.value = hiddenInput.value;
  };

  textInput.onblur = function() {
    var i;
    hiddenInput.value = this.value;
    this.value = '';
    for (i = 0; i < hiddenInput.value.length; i++) {
      this.value = this.value + '*';
    }
  };

</script>

Have a fiddle around with it ;-)

Upvotes: 0

Styxxy
Styxxy

Reputation: 7517

You don't output your password in your HTML, you create an asterix (*) representation of your password. This is easily done by the str_repeat function:

<?php
$password = "MyPasswordThatIWantToMask";
$maskedPassword = str_repeat("*", strlen($password));
?>

Now you just output the $maskedPassword as the value of the password field.

However, another very interesting thing: how do you know the users password length? I sincerely hope you hash your passwords rather than having them around plain text.

Upvotes: 1

Sampson
Sampson

Reputation: 268364

If you're looking for a simple way to just create a string of asterisks equal to the length of a password:

$modified = str_repeat( "*", strlen( "secretpass" ) );

echo $modified; // **********

Upvotes: 1

Jeroen
Jeroen

Reputation: 13257

$output_password = str_repeat ('*', strlen ($input_password));

Upvotes: 10

Kasapo
Kasapo

Reputation: 5374

One way would be to use an input of type password but set it to disabled.

<input type='password' disabled='disabled' value='somepassword' />

Upvotes: 0

Wampie Driessen
Wampie Driessen

Reputation: 1710

do it like this:

$passwordstring = "password";
$outputpassword = "";
while(strlen($outputpassword)<strlen($passwordstring))
{
    $outputpassword .= "*";
}

echo $outputpassword

Upvotes: 0

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