I am trying to redo some forms that have uppercase field names and spaces, there are hundreds of fields and 50 + forms... I decided to try to write a PHP script that parses through the HTML of the form.
So now I have a textarea that I will post the html into and I want to change all the field names from
name="Here is a form field name"
to
name="here_is_a_form_field_name"
How in one command could I parse through and change it so all in the name tags would be lowercase and spaces replace with underscores
I am assuming preg_replace with an expression?
Thanks!
I would suggest not using regex for manipulation of HTML .. I would use DOMDocument instead, something like the following
$dom = new DOMDocument();
$dom->loadHTMLFile('filename.html');
// loop each textarea
foreach ($dom->getElementsByTagName('textarea') as $item) {
// setup new values ie lowercase and replacing space with underscore
$newval = $item->getAttribute('name');
$newval = str_replace(' ','_',$newval);
$newval = strtolower($newval);
// change attribute
$item->setAttribute('name', $newval);
}
// save the document
$dom->saveHTML();
An alternative would be to use something like Simple HTML DOM Parser for the job - there are some good examples on the linked site
I agree that preg_replace() or rather preg_replace_callback() is the right tool for the job, here's an example of how to use it for your task:
preg_replace_callback('/ name="[^"]"/', function ($matches) {
return str_replace(' ', '_', strtolower($matches[0]))
}, $file_contents);
You should, however, check the results afterwards using a diff tool and fine-tune the pattern if necessary.
The reason why I would recommend against a DOM parser is that they usually choke on invalid HTML or files that contain for example tags for templating engines.
This is your Solution:
<?php
$nameStr = "Here is a form field name";
while (strpos($nameStr, ' ') !== FALSE) {
$nameStr = str_replace(' ', '_', $nameStr);
}
echo $nameStr;
?>
Related
i want to know how to keep all whitespaces of a text area in php (for send to database), and then echo then back later. I want to do it like stackoverflow does, for codes, which is the best approach?
For now i using this:
$text = str_replace(' ', '&nbs p;', $text);
It keeps the ' ' whitespaces but i won't have tested it with mysql_real_escape and other "inject prevent" methods together.
For better understanding, i want to echo later from db something like:
function jack(){
var x = "blablabla";
}
Thanks for your time.
Code Blocks
If you're trying to just recreate code blocks like:
function test($param){
return TRUE;
}
Then you should be using <pre></pre> tags in your html:
<pre>
function test($param){
return TRUE;
}
</pre>
As plain html will only show one space even if multiple spaces/newlines/tabs are present. Inside of pre tags spaces will be shown as is.
At the moment your html will look something like this:
function test($param){
return TRUE;
}
Which I would suggest isn't desirable...
Escaping
When you use mysql_real_escape you will convert newlines to plain text \n or \r\n. This means that your code would output something like:
function test($param){\n return TRUE;\n}
OR
<pre>function test($param){\n return TRUE;\n}</pre>
To get around this you have to replace the \n or \r\n strings to newline characters.
Assuming that you're going to use pre tags:
echo preg_replace('#(\\\r\\\n|\\\n)#', "\n", $escapedString);
If you want to switch to html line breaks instead you'd have to switch "\n" to <br />. If this were the case you'd also want to switch out space characters with - I suggest using the pre tags.
try this, works excellently
$string = nl2br(str_replace(" ", " ", $string));
echo "$string";
i have a string that has markers and I need to replace with text from a database. this text string is stored in a database and the markers are for auto fill with data from a different part of the database.
$text = '<span data-field="la_lname" data-table="user_properties">
{Listing Agent Last Name}
</span>
<br>RE: The new offer<br>Please find attached....'
if i can find the data marker by:
strpos($text, 'la_lname');
can i use that to select everything in and between the <span> and </span> tags..
so the new string looks like:
'Sommers<br>RE: The new offer<br>Please find attached....'
I thought I could explode the string based on the <span> tags but that opens up a lot of problems as I need to keep the text intact and formated as it is. I just want to insert the data and leave everything else untouched.
To get what's between two parts of a string
for example if you have
<span>SomeText</span>
If you want to get SomeText then I suggest using a function that gets whatever is between two parts that you put as parameters
<?php
function getbetween($content,$start,$end) {
$r = explode($start, $content);
if (isset($r[1])){
$r = explode($end, $r[1]);
return $r[0];
}
return '';
}
$text = '<span>SomeText</span>';
$start = '<span>';
$end = '</span>';
$required_text = getbetween($text,$start,$end);
$full_line = $start.$required_text.$end;
$text = str_replace($full_line, 'WHAT TO REPLACE IT WITH HERE',$text);
You could try preg_replace or use a DOM Parser, which is far more useful for navigating HTML-like-structure.
I should add that while regular expressions should work just fine in this example, you may need to do more complex things in the future or traverse more intrincate DOM structures for your replacements, so a DOM Parser is the way to go in this case.
Using PHP Simple HTML DOM Parser
$html = str_get_html('<span data-field="la_lname" data-table="user_properties">{Listing Agent Last Name}</span><br>RE: The new offer<br>Please find attached....');
$html->find('span')->innerText = 'New value of span';
I've found this code already for dealing with content between tags
$content_processed = preg_replace_callback(
'#\<pre\>(.+?)\<\/pre\>#s', create_function(
'$matches',
'return "<pre>".htmlentities($matches[1])."</pre>";' ), $content );
but how could I get it to just get a section of the HTML. The bit I'm looking at starts with;
click here</a></p><p><span class='title'>Soups<br />
and ends at
<div style='font-size:0.8em;'>
(The parts I've chosen are quite long because that way they are unique in the HTML.)
Do not parse html with regex. Bad, bad idea. Better use an XML parser to make it a nested object/array. That way you will be off much safer.
HOWEVER, if you use static code only on your web page (EG code that is never subject to change), you can just explode on that delimiter to chop the page in two halves, and explode again
example:
$html = file_get_contents('path/to/page.phtml');
$text = explode('click here</a></p><p><span class=\'title\'>Soups<br />', $html);
$text = explode('<div style='font-size:0.8em;'>', $text[1]);
$text = $text[0];
echo $text;
What is the easiest way of applying highlighting of some text excluding text within OCCASIONAL tags "<...>"?
CLARIFICATION: I want the existing tags PRESERVED!
$t =
preg_replace(
"/(markdown)/",
"<strong>$1</strong>",
"This is essentially plain text apart from a few html tags generated with some
simplified markdown rules: <a href=markdown.html>[see here]</a>");
Which should display as:
"This is essentially plain text apart from a few html tags generated with some simplified markdown rules: see here"
... BUT NOT MESS UP the text inside the anchor tag (i.e. <a href=markdown.html> ).
I've heard the arguments of not parsing html with regular expressions, but here we're talking essentially about plain text except for minimal parsing of some markdown code.
Actually, this seems to work ok:
<?php
$item="markdown";
$t="This is essentially plain text apart from a few html tags generated
with some simplified markdown rules: <a href=markdown.html>[see here]</a>";
//_____1. apply emphasis_____
$t = preg_replace("|($item)|","<strong>$1</strong>",$t);
// "This is essentially plain text apart from a few html tags generated
// with some simplified <strong>markdown</strong> rules: <a href=
// <strong>markdown</strong>.html>[see here]</a>"
//_____2. remove emphasis if WITHIN opening and closing tag____
$t = preg_replace("|(<[^>]+?)(<strong>($item)</strong>)([^<]+?>)|","$1$3$4",$t);
// this preserves the text before ($1), after ($4)
// and inside <strong>..</strong> ($2), but without the tags ($3)
// "This is essentially plain text apart from a few html tags generated
// with some simplified <strong>markdown</strong> rules: <a href=markdown.html>
// [see here]</a>"
?>
A string like $item="odd|string" would cause some problems, but I won't be using that kind of string anyway... (probably needs htmlentities(...) or the like...)
You could split the string into tag/no-tag parts using preg_split:
$parts = preg_split('/(<(?:[^"\'>]|"[^"<]*"|\'[^\'<]*\')*>)/', $str, -1, PREG_SPLIT_DELIM_CAPTURE);
Then you can iterate the parts while skipping every even part (i.e. the tag parts) and apply your replacement on it:
for ($i=0, $n=count($parts); $i<$n; $i+=2) {
$parts[$i] = preg_replace("/(markdown)/", "<strong>$1</strong>", $parts[$i]);
}
At the end put everything back together with implode:
$str = implode('', $parts);
But note that this is really not the best solution. You should better use a proper HTML parser like PHP’s DOM library. See for example these related questions:
Highlight keywords in a paragraph
Regex / DOMDocument - match and replace text not in a link
First replace any string after a tag, but force your string is after a tag:
$t=preg_replace("|(>[^<]*)(markdown)|i",'$1<strong>$2</strong>',"<null>$t");
Then delete your forced tag:
$show=preg_replace("|<null>|",'',$show);
You could split your string into an array at every '<' or '>' using preg_split(), then loop through that array and replace only in entries not beginning with an '>'. Afterwards you combine your array to an string using implode().
This regex should strip all HTML opening and closing tags: /(<[.*?]>)+/
You can use it with preg_replace like this:
$test = "Hello <strong>World!</strong>";
$regex = "/(<.*?>)+/";
$result = preg_replace($regex,"",$test);
actually this is not very efficient, but it worked for me
$your_string = '...';
$search = 'markdown';
$left = '<strong>';
$right = '</strong>';
$left_Q = preg_quote($left, '#');
$right_Q = preg_quote($right, '#');
$search_Q = preg_quote($search, '#');
while(preg_match('#(>|^)[^<]*(?<!'.$left_Q.')'.$search_Q.'(?!'.$right_Q.')[^>]*(<|$)#isU', $your_string))
$your_string = preg_replace('#(^[^<]*|>[^<]*)(?<!'.$left_Q.')('.$search_Q.')(?!'.$right_Q.')([^>]*<|[^>]*$)#isU', '${1}'.$left.'${2}'.$right.'${3}', $your_string);
echo $your_string;
I have a paragraph of text in the following format:
text text text <age>23</age>. text text <hobbies>...</hobbies>
I want to be able to
1) Extract the text found between each <age> and <hobbies> tag found in the string. So for example, I would have an array called $ages which will contain all ages found between all the <age></age> tags, and then another array $hobbies which will have the text between the <hobbies></hobbies> tags found throughout the string.
2) Be able to replace the tags which are extracted with a marker, such as {age_444}, so e.g the above text would become
text text text {age_444}. text text {hobbies_555}
How can this be done?
//Extract the age
preg_match_all("#<age>(.*?)</age>#",$string,$match);
$ages=$match[1];
//Extract the hobby
preg_match_all("#<hobbies>(.*?)</hobbies>#",$string,$match);
$hobbies=$match[1];
//Replace the age
$agefn=create_function('$match','$query=mysql_query("select ageid...where age=".$match[1]); return "<age>{age_".mysql_fetch_object($query)->ageid."}</age>"');
$string=preg_replace_callback("#<age>(.*?)</age>#",$agefn,$string);
//Replace the hobby
$hobfn=create_function('$match','$query=mysql_query("select hobid...where hobby=".$match[1]); return "<hobbies>{hobbies_".mysql_fetch_object($query)->hobid."}</hobbies>"');
$string=preg_replace_callback("#<hobbies>(.*?)</hobbies>#",$hobfn,$string);
If your source document is a kind of well-formed XML (or if it can easily be brought into this shape at least), you can use XSLT/XSL-FO to transform your document.
Finding informations enclosed by <> tags and rearranging/extracting them is one of the main features. You can use XSLT/XSL-FO stand-alone or within various languages (Java, C, even Visual Basic)
What you need is your source document and a document describing the transformation rules. The rendering machine or library function will do the rest.
Hope that helps. Good luck
$string = '<age>23</age><hobbies>hobbietext</hobbies>';
$ageTemp = explode('<age>', $string );
foreach($ageTemp as $key=>$value)
{
$age = explode('</age>', $value);
if(isset($age[0])) $ages[] = $age[0];
}
$hobbiesTemp = explode('<hobbies>', $string );
foreach($hobbiesTemp as $key=>$value)
{
$hobbie = explode('</hobbies>', $value);
if(isset($hobbie[0])) $hobbies[] = $hobbie[0];
}
final arrays are $hobbies and $ages
after that you just replace your sting like this:
foreach($ages as $key=>$value)
{
$string = str_replace('<age>'.$value.'</age>', '{age_'.$yourId.'}', $string);
}
foreach($hobbies as $key=>$value)
{
$string = str_replace('<hobbies>'.$value.'</hobbies>', '{hobbie_'.$yourId.'}', $string);
}