PHP: trying to create a new line with "\n"
i'm writing this:
echo "foo";
echo "\n";开发者_如何学Python
echo "bar";
and "bar" is not written in the line below.
What am i doing wrong?
Javi
Newlines in HTML are expressed through <br>, not through \n.
Using \n in PHP creates a newline in the source code, and HTML source code layout is unconnected to HTML screen layout.
If you want a new line character to be inserted into a plain text stream then you could use the OS independent global PHP_EOL
echo "foo";
echo PHP_EOL ;
echo "bar";
In HTML terms you would see a newline between foo and bar if you looked at the source code of the page.
ergo, it is useful if you are outputting say, a loop of values for a select box and you value having html source code which is "prettier" or easier to read for yourself later. e.g.
foreach( $dogs as $dog )
echo "<option>$dog</option>" . PHP_EOL ;
If you want to write plain text, you must ensure the content type is set to Content-Type: text/plain. Example:
header('Content-Type: text/plain');
If you are dealing with HTML, you have two options. One is to inset a new line using <br> (Or <br /> for XHTML). The other is to put the plain text in a <pre> element (In this case "pre" stands for preformatted).
PHP generates HTML. You may want:
echo "foo";
echo "<br />\n";
echo "bar";
if your text has newlines, use nl2br php function:
<?php
$string = "foo"."\n"."bar";
echo nl2br($string);
?>
This should look good in browser
Assuming you're viewing the output in a web browser you have at least two options:
Surround your text block with
<pre>statementsChange your
\nto an HTML<br>tag (<br/>will also do)
Since it wasn't mentioned, you can also use the CSS white-space property
body{
white-space:pre-wrap;
}
Which tells the browser to preserve whitespace so that
<body>
<?php
echo "hello\nthere";
?>
</body>
Would display
hello
there
We can use \n as a new line in php.
Code Snippet :
<?php
echo"Fo\n";
echo"Pro";
?>
Output:
Fo
Pro
It will be written on a new line if you examine the source code of the page. If you want it to appear on a new line when it is rendered in the browser, you'll have use a <br /> tag instead.
This works perfectly for me...
echo nl2br("\n");
Reference: http://www.w3schools.com/php/func_string_nl2br.asp
Hope it helps :)
This answer was so obvious and it took me forever to figure out:
echo "foo
bar";
I know that looks like it's wrapping. It's not. What I did is I literally hit return halfway through the string, between foo and bar. It creates a new line in the HTML source and makes your PHP look horrible. This was in Linux/Apache.
echo "foo<br />bar";
We can apply \n in php by using two type
Using CSS
body { white-space: pre-wrap; }Which tells the browser to preserve whitespace so that
<body> <?php echo "Fo\n Pro"; ?> </body>Result:
Fo
ProUsing
nl2brnl2br: Inserts HTML line breaks before all newlines in a string<?php echo nl2br("Fo.\nPro."); ?>Result
Fo.
Pro.
the html element break line depend of it's white-space style property.
in the most of the elements the default white-space is auto, which mean break line when the text come to the width of the element.
if you want the text break by \n you have to give to the parent element the style:
white space: pre-line, which will read the \n and break the line, or
white-space: pre which will also read \t etc.
note: to write \n as break-line and not as a string , you have to use a double quoted string ("\n")
if you not wanna use a white space, you always welcome to use the HTML Element for break line, which is <br/>
$a = 'John' ; <br/>
$b = 'Doe' ; <br/>
$c = $a.$b"<br/>";
加载中,请稍侯......
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