Programming PHP

Returns the portion of string from the first occurrence of character until the end of string.
If character is not found, the function returns false. Ifcharacter contains more than one
character, only the first is used.
strtok
string strtok(string string, string token)
string strtok(string token)
Breaks string into tokens separated by any of the characters in token and returns the next
token found. The first time you call strtok( ) on a string, use the first function prototype;
afterwards, use the second, providing only the tokens. The function contains an internal
pointer for each string it is called with. For example:
$string = "This is the time for all good men to come to the aid of their country."
$current = strtok($string, " .;,\"'");
while(!($current === FALSE)) {
print($current . "";
}
strtolower
string strtolower(string string)
Returns string with all alphabetic characters converted to lowercase. The table used for
converting characters is locale-specific.
strtotime
int strtotime(string time[, int timestamp])
Converts an English description of a time and date into a Unix timestamp value. Optionally,
a timestamp can be given that the function uses as the “now” value; if not, the current
date and time is used.
The descriptive string can be in a number of formats. For example, all of the following will
work:
echo strtotime("now");
echo strtotime("+1 week");
echo strtotime("-1 week 2 days 4 seconds");
echo strtotime("2 January 1972");
strtoupper
string strtoupper(string string)
Returns string with all alphabetic characters converted to uppercase. The table used for
converting characters is locale-specific.
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