- Programming-Idioms
- Idiom #48 Multi-line string literal
- Please choose a nickname before doing this
- PHP Multi-Line Strings: Best Practices and Methods
- Using HEREDOC and NOWDOC syntax
- Using escape sequences and concatenation
- Using triple quotes
- Other ways to create multi-line strings
- Best practices for working with multi-line strings
- Other helpful PHP code examples for writing multi-line strings
- Conclusion
- Frequently Asked Questions - FAQs
- What are multi-line strings in PHP?
- What are the advantages of using multi-line strings in PHP?
- What are HEREDOC and NOWDOC syntax in PHP?
- How do I use escape sequences and concatenation to create multi-line strings in PHP?
- What are best practices for working with multi-line strings in PHP?
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Idiom #48 Multi-line string literal
Assign to variable s a string literal consisting in several lines of text, including newlines.
$s = "This string is spanning three lines";
s : String := "Will this compile? " & "Oh yes it will";
"AzIceaqfA1hX5wS+M8cGnYh5ceevUnOZIzJBbXFD6dgf3tBkb9cvUF/Tkd/iKu2fsg9wAysY" "Kw7RMAsVvIp4KcXle/v1RaXrLVnNBJ2H2DmrbUMOZbQUFXe698qmJsqNpLXRA367xpZ54i8k" "C5DTXwDhfxWTOZrBrh5sRKHcoVLumztIQjgWh37AzmSd1bLOfUGI0xjAL9zJWO3fRaeB0NS2" "KlmoKaVT5Y04zZEc06waU2r6AU2Dc4uipJqJmObqKM+tfNKAS0rZr5IudRiC7pUwnmtaHRe5" "fgSI8M7yvypvm+13Wm4Gwd4VnYiZvSxf8ImN3ZOG9wEzfyMIlH2+rKPUVHI+igsqla0Wd9m7" "ZUR9vFotj1uYV0OzG7hX0+huN2E/IdgLDjbiapj1e2fKHrMmGFaIvI6xzzJIQJF9GiRZ7+0j" "NFLKSyzX/K3JAyFrIPObfwM+y
(def s "Murs, ville, Et port, Asile De mort, Mer grise Où brise La brise, Tout dort.")
IDENTIFICATION DIVISION. PROGRAM-ID. multi-line string. DATA DIVISION. WORKING-STORAGE SECTION. 01 s PIC X(20). 01 str PIC X(5) VALUE 'COBOL'. 01 str1 PIC X(4) VALUE 'RULE'. 01 str2 PIC X(3) VALUE 'THE'. 01 str3 PIC X(5) VALUE 'WORLD'. PROCEDURE DIVISION. STRING str ' ' str1 ' ' str2 ' ' str3 DELIMITED BY SIZE INTO s STOP RUN.
std::string s = R"( Earth is a planet. So is the Jupiter)";
string s = @"Huey Dewey Louie";
auto s = `line1 line2 line3`;
auto s = r"line1 line2 line3";
var s = """A multi-line string""";
var s = '''A multi-line string''';
s = ~S""" This will print multiline and escape char like \G """
S = "Strings may span across multiple lines" "and they can" "have as many portions" "as you want" "all of them quoted".
def s = """\ line 1 line 2 line 3""".stripIndent()
def s = """line 1 line 2 line 3"""
s = unlines [ "several" ,"lines" ,"of" ,"text"]
s :: String s = "We will put a backslash to take a break\ \and then a backslash to resume"
let s = "This is a very long string which needs \ to wrap across multiple lines because \ otherwise my code is unreadable.";
let s = "This is a very long string which needs \n" + "to wrap across multiple lines because \n" + "otherwise my code is unreadable.";
let s = `This is a very long string which needs to wrap across multiple lines because otherwise my code is unreadable.`;
String lineSeparator = System.lineSeparator(); String s = "line1" + lineSeparator + "line2" + lineSeparator;
String s = "This is a very long string which needs \n" + "to wrap across multiple lines because \n" + "otherwise my code is unreadable.";
String s = """ This is a very long string which needs to wrap across multiple lines because otherwise my code is unreadable. """;
val s = """ This is my multi-line string. """
NSString *s=@"Huey\n" @"Dewey\n" @"Louie";
var _s: String; begin _s := 'one' + LineEnding + 'two' + LineEnding + 'three' end.
$s = "Perl normally allows strings to contain newlines.";
let s = "line 1 line 2 line 3";
val s = """line 1 line 2 line 3"""
val s = """line 1 |line 2 |line 3""".stripMargin
(define s "This is my multi-line literal. Line number two! This line starts with two spaces.")
s := 'Will this compile? Oh yes, it will!'.
Dim s as String = " This Is Multiline Text!"
Please choose a nickname before doing this
$s = "This string is spanning three lines";
s : String := "Will this compile? " & "Oh yes it will";
"AzIceaqfA1hX5wS+M8cGnYh5ceevUnOZIzJBbXFD6dgf3tBkb9cvUF/Tkd/iKu2fsg9wAysY" "Kw7RMAsVvIp4KcXle/v1RaXrLVnNBJ2H2DmrbUMOZbQUFXe698qmJsqNpLXRA367xpZ54i8k" "C5DTXwDhfxWTOZrBrh5sRKHcoVLumztIQjgWh37AzmSd1bLOfUGI0xjAL9zJWO3fRaeB0NS2" "KlmoKaVT5Y04zZEc06waU2r6AU2Dc4uipJqJmObqKM+tfNKAS0rZr5IudRiC7pUwnmtaHRe5" "fgSI8M7yvypvm+13Wm4Gwd4VnYiZvSxf8ImN3ZOG9wEzfyMIlH2+rKPUVHI+igsqla0Wd9m7" "ZUR9vFotj1uYV0OzG7hX0+huN2E/IdgLDjbiapj1e2fKHrMmGFaIvI6xzzJIQJF9GiRZ7+0j" "NFLKSyzX/K3JAyFrIPObfwM+y
(def s "Murs, ville, Et port, Asile De mort, Mer grise Où brise La brise, Tout dort.")
IDENTIFICATION DIVISION. PROGRAM-ID. multi-line string. DATA DIVISION. WORKING-STORAGE SECTION. 01 s PIC X(20). 01 str PIC X(5) VALUE 'COBOL'. 01 str1 PIC X(4) VALUE 'RULE'. 01 str2 PIC X(3) VALUE 'THE'. 01 str3 PIC X(5) VALUE 'WORLD'. PROCEDURE DIVISION. STRING str ' ' str1 ' ' str2 ' ' str3 DELIMITED BY SIZE INTO s STOP RUN.
std::string s = R"( Earth is a planet. So is the Jupiter)";
string s = @"Huey Dewey Louie";
auto s = `line1 line2 line3`;
auto s = r"line1 line2 line3";
var s = """A multi-line string""";
var s = '''A multi-line string''';
s = ~S""" This will print multiline and escape char like \G """
S = "Strings may span across multiple lines" "and they can" "have as many portions" "as you want" "all of them quoted".
def s = """\ line 1 line 2 line 3""".stripIndent()
def s = """line 1 line 2 line 3"""
s = unlines [ "several" ,"lines" ,"of" ,"text"]
s :: String s = "We will put a backslash to take a break\ \and then a backslash to resume"
let s = "This is a very long string which needs \ to wrap across multiple lines because \ otherwise my code is unreadable.";
let s = "This is a very long string which needs \n" + "to wrap across multiple lines because \n" + "otherwise my code is unreadable.";
let s = `This is a very long string which needs to wrap across multiple lines because otherwise my code is unreadable.`;
String lineSeparator = System.lineSeparator(); String s = "line1" + lineSeparator + "line2" + lineSeparator;
String s = "This is a very long string which needs \n" + "to wrap across multiple lines because \n" + "otherwise my code is unreadable.";
String s = """ This is a very long string which needs to wrap across multiple lines because otherwise my code is unreadable. """;
val s = """ This is my multi-line string. """
NSString *s=@"Huey\n" @"Dewey\n" @"Louie";
var _s: String; begin _s := 'one' + LineEnding + 'two' + LineEnding + 'three' end.
$s = "Perl normally allows strings to contain newlines.";
let s = "line 1 line 2 line 3";
val s = """line 1 line 2 line 3"""
val s = """line 1 |line 2 |line 3""".stripMargin
(define s "This is my multi-line literal. Line number two! This line starts with two spaces.")
s := 'Will this compile? Oh yes, it will!'.
Dim s as String = " This Is Multiline Text!"
PHP Multi-Line Strings: Best Practices and Methods
Learn how to write multi-line strings in PHP using HEREDOC, NOWDOC, escape sequences, concatenation, triple quotes, and other methods. Discover best practices for improving code readability.
- Using HEREDOC and NOWDOC syntax
- Using escape sequences and concatenation
- Using triple quotes
- Other ways to create multi-line strings
- Best practices for working with multi-line strings
- Other helpful PHP code examples for writing multi-line strings
- Conclusion
- How to write string in multiple lines in PHP?
- How do I make multiple lines on a string?
- How to print in different lines in PHP?
- How to go to the next line in PHP?
As a programmer, writing clean and readable code is essential for collaboration with other developers and maintaining the codebase. One way to improve code readability is to use multi-line strings. Multi-line strings are especially helpful when writing lengthy texts, such as HTML or SQL queries. In this blog post, we will delve into the best practices and methods for writing multi-line strings in PHP.
Using HEREDOC and NOWDOC syntax
Heredoc and Nowdoc are two ways to create multi-line strings in PHP without using escape sequences or concatenation. The HEREDOC syntax has the form <<< and allows for the use of a delimiter to end the text. The NOWDOC syntax has the form <<<‘EOT’ and treats the text as a single-quoted string. Here is an example of using HEREDOC syntax:
$str = <<<EOT This is a multi-line string that can be written without using any escape sequences or concatenation. EOT;echo $str;
And here is an example of using NOWDOC syntax:
$str = <<<'EOT' This is a multi-line string that treats the text as a single-quoted string. EOT;echo $str;
Using escape sequences and concatenation
Escape sequences and concatenation are another way to create multi-line strings in PHP. Escape sequences such as \n or \r\n can be used to create new lines inside the source code. The concatenation assignment operator .= can be used to join multiple strings together. Here is an example of using escape sequences and concatenation:
$str = 'This is a multi-line string ' . "\n" . 'using escape sequences and concatenation.';echo $str;
Using triple quotes
Triple quotes are another way to create multi-line strings in PHP. Triple quotes can be used to create multi-line strings and are similar to using heredoc or nowdoc syntax . Here is an example of using triple quotes:
$str = """ This is a multi-line string using triple quotes. """;echo $str;
Other ways to create multi-line strings
There are several other ways to create multi-line strings in PHP. Newline characters such as \n or \r\n can be used to create a new line inside the source code. The PHP nl2br() function can be used to insert HTML line breaks before all newlines in a string. Literal single quotes and backslashes can be specified using escape characters. Long strings can be split into an array by dividing them into multiple lines. Here is an example of using various methods:
$str = "This is a multi-line string\nusing newline characters.\n"; $str .= 'This is another line using concatenation.' . "\n"; $str .= 'This is a line using literal \'single quotes\' and a \\backslash.' . "\n"; $str .= nl2br("This is a multi-line string\nusing the nl2br() function.\n"); $str .= implode("\n", [ 'This is a multi-line string', 'split into an array using', 'the implode() function.', ]);echo $str;
Best practices for working with multi-line strings
When working with multi-line strings, it is important to follow best practices to ensure code readability and maintainability. Here are some best practices for working with multi-line strings:
- Use HEREDOC or NOWDOC syntax for long strings.
- Divide long strings into an array.
- Use escape sequences and triple quotes.
- proper indentation and formatting .
Here is an example of using best practices:
$str = <<<EOT <div <h1>This is a multi-line string</h1> <p>using HEREDOC syntax.</p> </div> EOT;$str_array = [ '<div ' <h1>This is a multi-line string</h1>', ' <p>using an array.</p>', '</div>', ];echo implode("\n", $str_array);
Other helpful PHP code examples for writing multi-line strings
In php, php multiple line string code example
//use EOD function for multiple line variable $variable=
In php, Write Multi-Line Strings in PHP code example
In php, Write Multi-Line Strings in PHP code example
In php, Write Multi-Line Strings in PHP code example
In python, PHP echo multiple lines example code example
In php, Write Multi-Line Strings in PHP code example
In php, Write Multi-Line Strings in PHP code example
In python, PHP echo multiple lines example code example
Conclusion
In conclusion, multi-line strings are an important aspect of PHP programming and can improve code readability. HEREDOC, NOWDOC, escape sequences, concatenation, triple quotes, and other methods can be used to create multi-line strings. Following best practices, such as using HEREDOC or NOWDOC syntax, dividing long strings into an array, and proper formatting and indentation, will ensure that your code is easy to read and maintain.
Frequently Asked Questions - FAQs
What are multi-line strings in PHP?
Multi-line strings are a sequence of characters that span multiple lines in PHP. They are commonly used for formatting text or code for improved readability.
What are the advantages of using multi-line strings in PHP?
Multi-line strings improve code readability and make it easier to format text. They also eliminate the need for escape sequences or concatenation.
What are HEREDOC and NOWDOC syntax in PHP?
HEREDOC has the syntax <<< and allows for the use of a delimiter to end the text. NOWDOC has the syntax <<<'EOT' and treats the text as a single-quoted string.
How do I use escape sequences and concatenation to create multi-line strings in PHP?
Escape sequences such as \n or \r\n can be used to create new lines inside the source code. Concatenation assignment operator (.=) can be used to join multiple strings together.
What are best practices for working with multi-line strings in PHP?
Best practices include using HEREDOC or NOWDOC syntax for long strings, dividing long strings into an array, and proper formatting and indentation.