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import - Error importing csv - detected an illegal character in input string - Magento Stack Exchange
iconv_substr(): Detected an illegal character in input string · Issue #72 · symfony/polyfill · GitHub
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security - Magento 1.9 - 503 Error timing out - Notice: iconv_strlen(): Detected an illegal character in input string - Magento Stack Exchange
how to fix : Notice: iconv(): Detected an illegal character in input string in · Issue #46 · barbushin/php-imap · GitHub
how to fix : Notice: iconv(): Detected an illegal character in input string in · Issue #46 · barbushin/php-imap · GitHub
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Notice: iconv_mime_decode(): Detected an illegal character in input string in Maillog->mail() [#3323286] | Drupal.org
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