Replace A Character Of String Using PHP With Other Character

In this post, I am going to discuss a thing which may be interesting to you.

Suppose you have a text block which represents as a string in PHP and you want to replace a particular text or character with a new character. Well, it is very easy to do it because there is an inbuilt function in PHP which can do this task.

Replace Multiple Items In String Using PHP str_replace Function

Read meta description and title tag of a web page using PHP

About str_replace() PHP function

The str_replace() function is an inbuilt function of PHP which can be used to replace some characters with some other characters in a string.

Below is a simple example of a PHP str_replace() function which replaces the text user_name into Raju:

echo str_replace("user_name","Raju","Hello user_name!");

It will show the output “Hello Raju!” instead of showing “Hello user_name!”. You can also pass the replacing character as a variable like you can see below:

$username = "Raju";
echo str_replace("user_name", $username, "Hello user_name!");

It will return the same output “Hello Raju!”.

Using str_replace() PHP function with array

Below is another example code of using the str_replace function on an array from w3schools:

$arr = array("blue","red","green","yellow");
echo "<br>" . "Replacements: $i";

It will return the output like below:

Array ( [0] => blue [1] => pink [2] => green [3] => yellow )
Replacements: 1

So you can see that str_replace also can be used in an array and it also returns an array by replacing the value.

Below are some rules of using PHP str_replace () function:

  • str_replace function in PHP is case-sensitive function.
  • If the string to be found by this function is an array, it returns an array too
  • If both the character to find and replace are arrays, and replace has fewer elements than it found, an empty string will be used as replace
  • If the string to be searched is an array, find and replace is performed with every array element
  • If it find is an array and replace is a string, the replace string will be used for every find value in the array

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