What is the difference between single-quoted and double-quoted strings in PHP?

What is the difference between single-quoted and double-quoted strings in PHP?

php string syntax

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What Does This Mean in PHP -> or => [duplicate]

php syntax

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In PHP, why does </script> not show a parse error?

php syntax parse-error

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What does '<?=' mean in PHP?

php syntax

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Are "elseif" and "else if" completely synonymous?

php syntax conditional-statements

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What is the meaning of three dots (...) in PHP?

php syntax

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PHP Difference between array() and []

php arrays syntax square-bracket

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Why are functions and methods in PHP case-insensitive?

php syntax case-insensitive

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Shorthand for arrays: is there a literal syntax like {} or []?

php arrays syntax

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What is the use of <<<EOD in PHP?

php syntax

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PHP curly brace syntax for member variable

php syntax variables curly-braces

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PHP syntax question: What does the question mark and colon mean? [duplicate]

php syntax ternary-operator

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Double Underscore in PHP?

php syntax

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Check file uploaded is in csv format

php syntax file-upload content-type

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What are the PHP operators "?" and ":" called and what do they do?

php syntax conditional conditional-operator

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