PHP str_replace() Function

str_replace() replaces all occurrences of search string with a replacement string.

Syntax

str_replace(find, replace, string, count)

• find(required) – It specifies the value to find.
• replace(required) – It specifies the value to replace the value in find.
• string(required) – it specifies the string to be searched.
• count(optional) – it is the variable that counts the number of replacements.

For example

echo str_replace("world","John","Hello world!",$i);
echo "Replacements #: $i";

This function works by the following rules:

• If the string to be searched is an array, it returns an array
• If the string to be searched is an array, find and replace is performed with every array element
• If both find and replace are arrays, and replace has fewer elements than find, an empty string will be used as replace
• If find is an array and replace is a string, the replace string will be used for every find value