If statement failing in with custom field on a specific post with certain value length

Question

A very weird problem, but in a specific channel that has many custom fields I get a very peculiar problem with just one entry (as far as I can tell) where a particular custom field is failing only inside an if statement. Example:

{if my_custom_field}
  {my_custom_field}
{/if}

This causes the entire template to fail, resulting in a white screen. I've switched on every form of debugging (index file and admin area). There are no errors.

If I remove the if statement and simply output the field, it works fine. If I empty the field it works fine. If the field has only up to ~67 characters in it, it works fine.

Please bear in mind, this is only a problem with this entry; other entries don't experience this issue.

Things I've tried:

• Creating a new entry with the same data
• Rewriting the content of this field by hand (not copy-pasting in case of a malformed character)
• Renaming the custom field
• Adding the same content to a different field
• Reducing the number of if statements in the template
• Increasing the memory available to PHP

So my question really is: has anyone ever come across this before? Where can I look to solve it?

Answer 1

It could just be a quote or other glyph in the field which terminates the conditional early.

I wrote a little add on which might help you here. It will return the length of a given field so you can run your conditional check on that number rather than using the entire field contents.