php or sed: insert html tag within existing html tag when a string is matched

Question

How can I search for the word "Box" within the html code below:

<p>Text here ok</p>
<h4>
Box 1.2</h4>
<p>Text here ok</p>

and have the output as follows?

<p>Text here ok</p>
<h4><a name="box1.2"></a>Box 1.2</h4>
<p>Text here ok</p>

Note the line break between <h4> and Box needs to be removed. The other thing is I will have "Box 2.0", "Box 2.3", etc. so only the word "Box" has the matching pattern.

Will it always be in <h4> tag or it can be inside other HTML tags as well (like div, p, span etc)? — anubhava
– anubhava, Commented May 6, 2013 at 7:55

Anthony Sterling · Accepted Answer · 2013-05-06 08:10:38Z

1

Here's something to get you going.

<?php
$html = '<p>Text here ok</p>
<h4>
Box 1.2</h4>
<p>Text here ok</p>';

$html = preg_replace_callback('~[\r\n]?Box\s+[\d.]+~', function($match){
    $value  = str_replace(array("\r", "\n"), null, $match[0]);
    $name   = str_replace(' ', null, strtolower($value));
    return sprintf('<a name="%s"></a>%s', $name, $value);
}, $html);

echo $html;

/*
    <p>Text here ok</p>
    <h4><a name="box1.2"></a>Box 1.2</h4>
    <p>Text here ok</p>
*/

answered May 6, 2013 at 8:10

Anthony Sterling

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1 Comment

horkust Over a year ago

@anubhava: yes, may be any other tags but the concern is the word "Box". It's part of another file which looks for the boxed anchors in here.

HamZa · Accepted Answer · 2013-05-06 09:15:15Z

0

Using PHP:

$str = '<p>Text here ok</p>
<h4>
Box 1.2</h4>
<p>Text here ok</p>';

$new = preg_replace('/\s*(box)\s*(\d+(:?\.\d+)?)/i', '<a name="$1$2">$1 $2</a>', $str);
echo $new;

Explanation:

/ #START delimiter
    \s* #match spaces/newlines (optional/several)
    (box) #match "box" and group it (this will be used as $1)
    \s* #match spaces/newlines (optional/several)
    (\d+(:?\.\d+)?) #match a number (decimal part is optional) and group it (this will be used as $2)
/ #END delimiter
i #regex modifier: i => case insensitive

edited May 6, 2013 at 9:15

answered May 6, 2013 at 8:33

HamZa

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1 Comment

Casimir et Hippolyte Over a year ago

(\d+(:?\.\d+)) -> (\d+(?:\.\d+)?)

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