CODEWITHSUNDEEP
php
Edwinner
Edwinner

Reputation: 2657

Need to replace arrays with strings

I have this string: CO2 + H2O + XO

And I am going for this: CO2 + H2O + NaO.

I have researched this quite a bit and I am at a loss on what to do with a mixture of strings and arrays.

$reactant = 'CO2 + H2O + XO';

$products = str_split($reactant);

foreach ($products as $splitresult)
{
  $splitresult = str_replace('X', 'Na', $splitresult); 
}

echo $splitresult;

Upvotes: 0

Views: 69

Answers (4)

Seeinyou
Seeinyou

Reputation: 70

<?php
$reactant = 'CO2 + H2O + XO';
$products = explode($reactant, ' + ');

foreach($products as $key => $splitresult)
{
    $products[ $key ] = str_replace('X', 'Na', $splitresult);
}
print_r( $products );

Upvotes: 0

Thibault
Thibault

Reputation: 1596

What about just this : 

<?php
 $reactant = 'CO2 + H2O + XO';
 $reactant = str_replace('X', 'Na', $reactant);
?>

If you really want to split because your code is longer, you have to set via the key, because the $splitresult will be overwritten after each loop pass. It's a temporary variable. Here is the right way to do it :

<?php
 $reactant = 'CO2 + H2O + XO';
 $products = str_split($reactant);

 foreach($products as $i=>$splitresult)
 {
  $products[$i] = str_replace('X', 'Na', $splitresult) ;
 }
 $reactant = implode('',$products);
?>

Upvotes: 1

Ryan
Ryan

Reputation: 3582

If you're always going to be joining the elements up with a plus sign, you could explode the string as so:

$parts = explode(' + ', $reactant);

Then loop around the array

foreach($parts as &$part) {
    $part = str_replace('X', 'Na', $part);
}

Then to display the results, implode the array back together using the plus:

$reactant = implode(' + ', $parts);

Upvotes: 2

John Allen
John Allen

Reputation: 159

echo str_replace('X', 'Na', $reactant) ;

Upvotes: 2

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