PHP Function: Built-in Functions part 10

Regular Expression Functions

ereg_replace() and eregi_replace()
The ereg_replace() and eregi_replace() functions replace instances of a pattern within a string and return the new string. The ereg_replace() function performs a clase-sensitive match, and eregi_replace() performs a case-insensitive match. Here is the syntax for both functions:

ereg_replace(pattern, replacement, string);
eregi_replace(pattern, replacement, string);

For example, you would use the following code to replace “ASP” with “PHP” in the string “I really love programming in ASP”:

$old_string = "I really love programming in ASP"; 
$new_string = ereg_replace("ASP", "PHP", $old_string); 
echo "$new_string"; 

If “ASP” is mixed case, such as “aSp”, use the eregi_replace() function:

$old_string = "I really love programmin in aSp"; 
$new_string = eregi_replace("ASP", "PHP", $old_string); 
echo "$new_string";

split()
The split() function splits a string into an array using a certain separator (comma, colon, semicolon, and so on). Its syntax is

split(pattern, string, [limit]);

If limit is specified, the split() function stops at the named position–for example, at the tenth value in a common-delimited list. Next php function: Built-in Functions part 11