Replace text string with PHP session variable using PHP or Javascript

Question

I have a string of text that is part of a URL on a PHP page that looks like this:.

<a href="http://www.adomain.com/links.php?EmpNo={{EMP_NO}}">LINK</a>

I need to replace the {{EMP_NO}} with a session variable I have created $SESSION['EmpNo']

The href is populated by a PHP function that queries the database and writes the href links depending on the userid.

function get_user_icons($user_id)
{
    $icons = array();
    $user_id = mysql_real_escape_string($user_id);

    $sql = "SELECT ic.* "
        . "FROM gbl_empicons AS em "
        . "LEFT JOIN gbl_icons AS ic ON em.IconId = ic.id "
        . "WHERE em.EmpNo = '$user_id' ORDER BY em.IconId";
    $res = mysql_query($sql) or die(mysql_error());

    while ($row = mysql_fetch_assoc($res))
    {
        $icons[] = $row;
    }

    return $icons;
}

Later the actual links are written out like this:

$icons = get_user_icons($row_WAATKgblqemplisting['EmpNo']); 

    foreach ($icons as $ic)
    {       
echo $ic['url'] . ' ';
    }

I've tried to update this function with str_replace with no luck in both locations.

str_replace('{{EMP_NO}}', $_SESSION['EmpNo']);

This is not working. I have also tried to use the em.EmpNo to no avail. What is the best way to achieve this result?

I'm not, I updated it. I basically want to replace any instance of {{EMP_NO}} found on the page with the session. — Rocco The Taco
– Rocco The Taco, Commented Nov 30, 2017 at 18:48
Dont just hide variables lol, now the str_replace wont work, and will cause people to think that's the issue. — Lawrence Cherone
– Lawrence Cherone, Commented Nov 30, 2017 at 18:48
@RoccoTheTaco: str_replace doesn't search back through all raw output of the page. Nothing does. Unless you're using a templating engine of some kind (as can be implied by the {{placeholder}} syntax), what you'd need to do is output the value where it's needed. Like in an answer posted below: stackoverflow.com/a/47580611/328193 — David
– David, Commented Nov 30, 2017 at 18:51
Seems like an XY Problem, you must be outputting the html from somewhere. Be it from the database or right at the end before an echo or a view, you will always have somewhere where you can str_replace or worse use buffering. 3v4l.org/LJR81 — Lawrence Cherone
– Lawrence Cherone, Commented Nov 30, 2017 at 19:02

Alam Darji · Accepted Answer · 2017-12-01 14:25:07Z

1

change the foreach loop:

foreach ($icons as $ic) { 
    echo str_replace('{{EMP_NO}}', $_SESSION['EmpNo'], $ic['url']) . ' '; 
}

answered Dec 1, 2017 at 14:25

Alam Darji

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Alam Darji · Accepted Answer · 2017-11-30 18:48:35Z

0

Try this code

<a href="http://www.adomain.com/links.php?EmpNo=<?= $_SESSION['EmpNo']; ?>">LINK</a>

answered Nov 30, 2017 at 18:48

Alam Darji

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6 Comments

Rocco The Taco Over a year ago

That won't work as the href is written out from a database. I need to manipulate it after it's written

Alam Darji Over a year ago

<?php echo str_replace('{{EMP_NO}}', $_SESSION['EmpNo']); ?> maybe this should help. use it when you are writing the href from the database

David Over a year ago

@RoccoTheTaco: Then use str_replace() on the value you're getting from the database. Before you output it to the page.

Rocco The Taco Over a year ago

@David I updated the question as that make sense but still need some help. Please review.

Alam Darji Over a year ago

change this int the foreach loop: foreach ($icons as $ic) { echo str_replace('{{EMP_NO}}', $_SESSION['EmpNo'], $ic['url']) . ' '; }

|

David · Accepted Answer · 2017-11-30 19:09:26Z

0

That's not how you use str_replace(). You forgot the third function argument, the overall string in which you want to search for something and replace it with something else.

So where is that string? Looks like it's right here:

echo $ic['url'] . ' ';

That's what you'd replace:

echo str_replace('{{EMP_NO}}', $_SESSION['EmpNo'], $ic['url']) . ' ';

Wherever you output or otherwise can manipulate the string value that contains this link, that's where you would replace its contents.

edited Nov 30, 2017 at 19:09

answered Nov 30, 2017 at 19:08

David

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1 Comment

Rocco The Taco Over a year ago

This solved it: foreach loop: foreach ($icons as $ic) { echo str_replace('{{EMP_NO}}', $_SESSION['EmpNo'], $ic['url']) . ' '; }

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