How to replace array_value?

Question

$arr = ["250","250","500","500","250"];

Here is my $arr array. I want to replace 300 instead of 500.

Sample:

["250","250","300","300","250"]; //Output

Here is my code

$length = sizeof($arr);

for($i = 0; $i < $length; $i++)
{

 if($arr[$i] <= 300)
 {

 }
 else
 {
      $replace = array($i => "300");
      array_replace($arr, $replace);
 }

}

Please provide a question. It is not clear what you want to find out. — Radu Diță
– Radu Diță, Commented Jan 18, 2019 at 17:00
I want ["250","250","500","500","250"] this array replace to ["250","250","300","300","250"]; using for loop or foreach — A.Developer
– A.Developer, Commented Jan 18, 2019 at 17:02

AbraCadaver · Accepted Answer · 2019-01-18 17:03:41Z

3

You should use the str_replace() function, that allows you to replace a value with another one in both strings and arrays.

In your case it would be:

$arr = str_replace("500","300",$arr);

edited Jan 18, 2019 at 17:03

AbraCadaver

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answered Jan 18, 2019 at 16:51

J. Almandos

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1 Comment

AbraCadaver Over a year ago

Just know this will replace the 500 in 5000 with 300 yielding 3000, 50015 to 30015, etc...

Shobi · Accepted Answer · 2019-01-18 17:58:14Z

0

you could use array_replace(), but it works not by value, rather by position, and array_replace() returns a new array rather than mutating the original one.

you could modify the else part of your code like below, since you were not using the modified array;

 ....
 ....
 else
 {
  $replace = array($i => "300");
  $arr2 = array_replace($arr, $replace);
  var_dump($arr2);//this holds the replaced array
 }

edited Jan 18, 2019 at 17:58

answered Jan 18, 2019 at 17:01

Shobi

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