PHP: How can i create links from a variable?

Question

The variable looks like this:

$keywords = 'key1, key2, key3, key4';

How can i create links like:

<a href="../tag/key1">key1</a>, <a href="../tag/key2">key2</a>, <a href="../tag/key3">key3</a>, <a href="../tag/key4">key4</a>

using php?

// Edited

What if $is defined with

$keywords = 'key1, keyword two, key3, key four';

or even other order?

<a href="../tag/key1">key1</a>, <a href="../tag/keyword+two">keyword two</a>, <a href="../tag/key3">key3</a>, <a href="../tag/key+four">key four</a>

i mean, if one of the 'keyword' it is formed from two words add a '+' sign between them at the link

How can this been done?

@Balanivash -- looks like a string to me

Naftali
– Naftali

2011-06-28 19:40:54 +00:00
Commented Jun 28, 2011 at 19:40 — Naftali
– Naftali, Commented Jun 28, 2011 at 19:40

Naftali · Accepted Answer · 2011-06-28 19:57:42Z

6

Try this out:

foreach(explode(', ',$keywords) as $value){
    echo "<a href='../tag/$value'>$value</a>";
}

To do with commas:

$keyArray = explode(', ',$keywords);
$keyLength = count($keyArray);
foreach($keyArray as $key=>$value){
    echo "<a href='../tag/$value'>$value</a>";
    if($key < ($keyLength - 1)){
          echo ", ";
    }
}

UPDATE TO OP:

$keyArray = explode(', ',$keywords);
$keyLength = count($keyArray);
foreach($keyArray as $key=>$value){
    echo "<a href='../tag/";
    $vArr = explode(' ', $value);
    $vLength = count($vArr);
    foreach($vArr as $kv=>$v){
         echo $v;
         if($kv < ($vLength - 1))  echo "+";
    }
    echo "'>$value</a>";
    if($key < ($keyLength - 1)){
          echo ", ";
    }
}

edited Jun 28, 2011 at 19:57

answered Jun 28, 2011 at 19:40

Naftali

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9 Comments

Toby Over a year ago

I think you beat me by a second! Apart from saving a line are their any benefits to doing your explode inside the foreach?

Naftali Over a year ago

@TimCooper i added the commas although im not sure why :-P

Naftali Over a year ago

@Toby ur way might be better (in my way it has to get the index of the explode every time)

user142162 Over a year ago

@Neal: That adds an unnecessary comma to the end of the list.

Toby Over a year ago

I am going to run some tests.

|

Toby · Accepted Answer · 2011-06-28 20:04:15Z

3

The first thing you want to do is explode that string.

$links = explode(',', $keywords);

Then you want to loop it...

for($counter = 0; $counter < sizeof($links); $counter++) {
    if($counter > 0) {
        echo ", ";
    }
    echo "<a href='../tag/".str_replace(' ', '+', trim($link[$counter]))."'>{$link[$counter]}</a>";
}

edited Jun 28, 2011 at 20:04

answered Jun 28, 2011 at 19:41

Toby

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5 Comments

Naftali Over a year ago

@Toby, now it definitely does

Toby Over a year ago

Nope, so the first time around the loop no comma, then every other time until the end of the loop the <a> will be prefaced with a comma.

m3tsys Over a year ago

thank you, but it has a problem: <a href='../tag/funny'>funny</a>, <a href='../tag/+video+funny'> video funny</a>

m3tsys Over a year ago

it has a space in in the from the link text and a + in the front of the tag name...

Toby Over a year ago

I have now trimmed the text first. Please update your question to include this information.

user142162 · Accepted Answer · 2011-06-28 20:03:11Z

2

The following is updated to your new requirements:

function keyword_url($arr)
{
    return sprintf('%s<a href="../tag/%s">%s</a>', $arr[1], urlencode($arr[2]), $arr[2]);
}

$keywords = 'key1, key2 piece, key3, key4';
echo preg_replace_callback('/((?:^)|(?:, *))([\w ]+)/', 'keyword_url', $keywords);

answered Jun 28, 2011 at 20:03

user142162

1 Comment

Toby Over a year ago

Does this solve the leading space issue if the keyword is ' funny pictures'?

Balanivash · Accepted Answer · 2011-06-28 19:41:41Z

1

 <?php  $keyword = explode(',',$keywords); ?> 
 <a href="../tag/<?php echo $keyword[0]; ?>">key1</a>
 <a href="../tag/<?php echo $keyword[2]; ?>">key3</a>

answered Jun 28, 2011 at 19:41

Balanivash

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Comments

Kenzal Hunter · Accepted Answer · 2011-06-28 19:43:55Z

1

First use explode() to split your keyword string into an array

From there there are a number of ways to turn an array into a series or array of strings. You could even use implode to bring an array of link strings back into a single string.

answered Jun 28, 2011 at 19:43

Kenzal Hunter

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Comments

Senad Meškin · Accepted Answer · 2011-06-28 19:45:16Z

1

<?php

$keywords = 'key1, key2, key3, key4';

$vars = explode(',',$keywords);
foreach($vars as $key => $value)
{
    echo '<a href="'.$value.'" title="' . $value . '">'.$value.'</a><br/>';
}
?>

answered Jun 28, 2011 at 19:45

Senad Meškin

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