How to remove line breaks from the string in PHP?

The line break can be removed from string by using str_replace() function. The str_replace() function is an inbuilt function in PHP which is used to replace all the occurrences of the search string or array of search strings by replacement string or array of replacement strings in the given string or array respectively.
Syntax: 
 

str_replace ( $searchVal, $replaceVal, $subjectVal, $count ) 
 

Return Type: This function returns a new string or array based on the $subjectVal parameter with replaced values.
Example: After replacing the <br> tag, the new string is taken in the variable text. 
 

<?php

// Declare a variable and initialize it
// with strings containing <br> tag
$text = "Geeks<br>For<br>Geeks";

// Display the string
echo $text;
echo "\n";

// Use str_replace() function to
// remove <br> tag 
$text = str_replace("<br>", "", $text);

// Display the new string 
echo $text;

?>

Geeks
For
Geeks
GeeksForGeeks

Using preg_replace() function: The preg_replace() function is an inbuilt function in PHP which is used to perform a regular expression for search and replace the content.
Syntax: 
 

preg_replace( $pattern, $replacement, $subject, $limit, $count )

Return Value: This function returns an array if the subject parameter is an array, or a string otherwise.
Example: This example use preg_replace() function to remove line break. 
 

<?php

// Declare a variable and initialize it
// with strings containing <br> tag
$text = "Geeks<br>For<br>Geeks";

// Display the string
echo $text;
echo "\n";

// Use preg_replace() function to
// remove <br> and \n
$text = preg_replace( "/<br>|\n/", "", $text );

// Display the new string 
echo $text;

?>

Geeks
For
Geeks
GeeksForGeeks