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PHP code must always being with the long form opening tag. If a file contains only PHP code, the end tag may optionally be omitted from the end of a the file.
Code Block |
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language | php |
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title | Tag Usage |
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<?php
?> |
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Programming Styles
Strings
Literals
Strings consisting of more than one character should be surrounded with double-quotes ("). Strings consisting of only a single character may be surrounded with single-quotes (').
Code Block |
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$str = "This is a long string";
$chr = 'a'; |
Concatenation
Run-on Strings
A string whose length requires it to wrap multiple lines should be concatenated with the concatenation character (.) appended at the end of the line, with the carry-over line indented below it.
Code Block |
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$str = "This is a string that needs to " .
"wrap onto another line."; |
Variable Substitution
When a variable needs to be added to a string the string should be broken open and concatenated together to improve readability.
Code Block |
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|
$name = "Hefo Quient Esbit";
$str = "Hello " . $name . "! How are you?" |
Arrays
Numerically Index Arrays
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