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Accepted
JOSE HERRADA
Asked: 2020-10-13 06:22:26 +0800 CST 2020-10-13 06:22:26 +0800 CST

Search for characters in a specific section of the PHP string

  • 772

I'm trying to replace the > character with # inside the HTML5 code tag . The problem is that the > code character is replaced and it gives me an error in the HTML5 source code.

This is the string in which I am looking for those characters

window.setInterval(function(){
        if ($('>title_theme').val().length &gt= 1) {
            cargarArchivo(
                'POST',
                'http://labex.com/PostsController',
                'title_p=' + $('>title_theme').val()
            );
        }

The above code is wrapped in the code tag to be displayed as snippet code on my web page.

$('>title_theme') El caracter > debe ser reemplazado por #

I have tried to replace the > character but it changes the > character of the code itself , resulting in an error in the HTML5 source code (the snippet code is simply not displayed)

Use preg_replace to find and replace

$simbolos = array(
                                    '/</uim',
                                    '/>/uim',
                                    '/\<code\>/uim',
                                    '/&amp;\>\b39/uim',
                                    '/&amp;\bquot/uim',
                                    '/&amp;\blt/uim',
                                    '/&amp;\bgt/uim',
                                    '/\<\/code\>/uim',
                                );
                                $reemplazos = array(
                                    '<',
                                    '>',
                                    "<div class='code'><pre class='prettyprint'><code>",
                                    "'",
                                    '"',
                                    '&lt',
                                    '&gt',
                                    "</code></pre></div>",
                                );
                                $resultado = preg_replace($simbolos, $reemplazos, $request->getSend()->input('content'));
                                echo $resultado;

Without the preg_replace replacements the content would look like this:

window.setInterval(function(){
        if ($(&amp;&gt;39&gt;title_theme&amp;&gt;39).val().length &amp;gt= 1) {
            cargarArchivo(
                &amp;&gt;39POST&amp;&gt;39,
                &amp;&gt;39http://labex.com/PostsController&amp;&gt;39,
                &amp;&gt;39title_p=&amp;&gt;39 + $(&amp;&gt;39&gt;title_theme&amp;&gt;39).val()
            );
        }

Trying with the code:

$resultado=str_replace('>','#',html_entity_decode($request->getSend()->input('content')));
echo $resultado;

The result would be the following:

 <code#
window.setInterval(function(){
        if ($(&#39#title_theme&#39).val().length &gt= 1) {
            cargarArchivo(
                &#39POST&#39,
                &#39http://labex.com/PostsController&#39,
                &#39title_p=&#39 + $(&#39#title_theme&#39).val()
            );
        }
  </code#

It would be nice to replace all the # that are between code and /code , not to replace the < and > of the code tags

php

2 Answers

  1. Best Answer

    To solve it you must use html_entity_decode()to transform all HTML entities to their corresponding characters.

    Then you apply the str_replace():

    $resultado=str_replace('>','#',html_entity_decode($request->getSend()->input('content')));
echo $resultado;

    Then to avoid changing also the >in the labels <code>you can replace it one more time like this:

    $string=str_replace('>','#',html_entity_decode($request->getSend()->input('content')));
$resultado=str_replace('code#','code>',$string);
echo $resultado;

    For more information you can review the documentation

    I hope it is what you are looking for, greetings.

    • 1

  2. Very well. Analyzing the code gave me an insight into the regular expressions of preg_replace. I will leave the answer

    <?php 
                                $simbolos = array(
                                    '/&lt;/uim',
                                    '/&gt;/uim',
                                    '/\<code\>/uim',
                                    '/&amp;\>\b39/uim',
                                    '/&amp;\bquot/uim',
                                    '/&amp;\blt/uim',
                                    '/&amp;\bgt/uim',
                                    '/\>|\</uim', // Reemplazo todos los caracteres a #
                                    '/\#code\#/uim', // Las etiquetas #code# sera reemplazada por <code>
                                    '/\#\/code\#/uim', //La etiqueta de cierre #/code# sera reemplaza por </code>
                                    "/\#pre class='prettyprint'\#/uim" // Incluir el plugin prettify JS
                                );
                                $reemplazos = array(
                                    '<',
                                    '>',
                                    "<pre class='prettyprint'><code>",
                                    "'",
                                    '"',
                                    '&lt',
                                    '&gt',
                                    '#',
                                    '<code>',
                                    '</code></pre>',
                                    "<pre class='prettyprint'>"
                                );
                                $resultado = preg_replace($simbolos, $reemplazos, $request->getSend()->input('content'));
                                echo $resultado;
                            ?>

    All < and > characters are replaced by # (including code and /code ), once replaced we have to reestablish the code and /code tags so that we don't get an error in HTML, so it is replaced with regular expressions.

    If we do the above, the result would be like this:

    window.setInterval(function(){
        if ($('#title_theme').val().length &gt= 1) {
            cargarArchivo(
                'POST',
                'http://labex.com/PostsController',
                'title_p=' + $('#title_theme').val()
            );
        }

$('#title_theme') // El caracter que salia antes > fue reemplazado por #, lo cual es correcto para codigo JQuery

    I realized that > appears in the previous code, it is because I copied it from the source code of the page, but visually it would look like this:

    window.setInterval(function(){
        if ($('#title_theme').val().length >= 1) {
            cargarArchivo(
                'POST',
                'http://labex.com/PostsController',
                'title_p=' + $('#title_theme').val()
            );
        }
    • 1