Tutorials

String function

If you were a cat, string functions would be the cat's meow, all puns intended. Besides being a large part of your PHP code, they provide much of the functionality to identify and alter your data into other formats, such as arrays

addslashes($string)

Adds backslashes (escape string) to items within $string to make it safe for database queries. Effects single quotes ( ' ), double quotes ( " ), backslashes ( \ ), and the NUL byte.

Example:

$string = ' Tom said, "Marcus is mad!"';
echo $string;
$string = addslashes($string);
echo $string;
Tom said, "Marcus is mad!" Tom said, \"Marcus is mad!\"
See Also:
get_magic_quotes_gpc – Server setting for automatically applying
addslashes to GET/POST/COOKIE data
stripslashes() – Remove the backslashes created by addslashes()

stripslashes($string)
Removes backslashes (escape string) from items within $string added
throughaddslashes() or magic_quotes_gpc.

Example:

$string = ' Tom said, "Marcus is mad!"';
$string = addslashes($string);
echo $string;
$string = stripslashes($string);
echo $string;
Tom said, \"Marcus is mad!\" Tom said, "Marcus is mad!"

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Math's Function

abs — Absolute value

bindec — Binary to decimal

decbin — Decimal to binary

dechex — Decimal to hexadecimal

decoct — Decimal to octal

hexdec — Hexadecimal to decimal

log — Natural logarithm

max — Find highest value

min — Find lowest value

sqrt — Square root

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