URL encoding converts characters into a format that can be safely transmitted over the Internet.
URL Encoding
URLs can only be sent over the Internet using the ASCII character-set.
Since URLs often contains characters outside the ASCII set, the URL has to be converted. URL encoding converts the URL into a valid ASCII format.
URL encoding replaces unsafe ASCII [...]

Since I always try to remember what this PHP code is, and I can never remember, I thought I’d add it to my blog so I never forget.
This searches a string of text and finds a user defined variable. Very handy.
$string = “PHP”;
$container = “I love writing PHP code.”;
if(strstr($container,$string)) {
echo “found it.”;
} else {
echo “not [...]

Definition: You can use str_replace in PHP to find and replace data with alternate data. For example you could use it to filter forum posts to find offensive words and replace them with asterisks. It is phrased as: str_replace ( search_for, replace_with, apply_to )The first parameter is what you are searching for, the second parameter [...]

Definition: Unset () is used to destroy a variable in PHP. In can be used to remove a single variable, multiple variables, or an element from an array. It is phrased as Unset ($remove).
Also Known As: Unset Variable, Destroy Variable
Examples:
<?php
// remove a single variable
unset($a);
// remove a single element in an array
unset($my_array['element']);
// remove multiple variables
unset($a, [...]

Definition: Eval () is used to read the input string value as PHP code. Instead of reading the as a string like the Echo () function it instead reads the output as PHP code to be executed. One reason to use this is to store code in your MySQL database to pull out and execute [...]