There are two string operators. The first is the concatenation operator ['.'], which returns the concatenation of its right and left arguments. The second is the concatenating assignment operator ['.='], which appends the argument on the right side to the argument on the left side. Please read Assignment Operators for more
information.
K.Alex ¶
9 years ago
As for me, curly braces serve good substitution for concatenation, and they are quicker to type and code looks cleaner. Remember to use double quotes [" "] as their content is parced by php, because in single quotes [' '] you'll get litaral name of variable provided:
anders dot benke at telia dot com ¶
18 years ago
A word of caution - the dot operator has the same precedence as + and -, which can yield unexpected results.
Example:
The above will print out "3" instead of "Result: 6", since first the string "Result3" is created and this is then added to 3 yielding 3, non-empty non-numeric strings being converted to 0.
To print "Result: 6", use parantheses to alter precedence:
Stephen Clay ¶
16 years ago
Use double quotes to concat more than two strings instead of multiple '.' operators. PHP is forced to re-concatenate with every '.' operator.
hexidecimalgadget at hotmail dot com ¶
13 years ago
If you attempt to add numbers with a concatenation operator, your result will be the result of those numbers as strings.
mariusads::at::helpedia.com ¶
14 years ago
Be careful so that you don't type "." instead of ";" at the end of a line.
It took me more than 30 minutes to debug a long script because of something like this:
The output is "axbc", because of the dot on the first line.
biziclop ¶
11 days ago
Some bitwise operators [the and, or, xor and not operators: & | ^ ~ ] also work with strings too since PHP4, so you don't have to loop through strings and do chr[ord[$s[i]]] like things.
See the documentation of the bitwise operators: //www.php.net/operators.bitwise
Live demo: //3v4l.org/MnFeb