使用php将html实体恢复为特殊字符

Question

I want to convert special characters to HTML entities, and then back to the original characters.

I have used htmlentities() and then html_entity_decode() . It worked fine for me, but { and } do not come back to the original characters, they remain { and } .

What can I do now?

My code looks like:

$custom_header = htmlentities($custom_header);
$custom_header = html_entity_decode($custom_header);

Answer 1

Even though nobody can replicate your problem, here's a direct way to solve it by a simple str_replace .

$input = '<p><script type="text/javascript"> $(document).ready(function() &#123; $("#left_side_custom_image").click(function() &#123; alert("HELLO"); &#125;); &#125;); </script></p> ';
$output = str_replace( array( '&#123;', '&#125;'), array( '{', '}'), $input);

Demo (click the 'Source' link in the top right)

Edit: I see the problem now. If your input string is:

"{hello}"

A call to htmlentities encodes the & into & , which gives you the string

"{hello}"

The & is then later decoded back into & , to output this:

"{hello}"

The fix is to send the string through html_entity_decode again, which will properly decode your entities.

$custom_header = "{hello}";
$custom_header = htmlentities($custom_header);

$custom_header = html_entity_decode($custom_header);
echo html_entity_decode( $custom_header); // Outputs {hello}