<?php
$json_string = '{"str1":"x66xexq"}';
$str2 = 'x66xexq';
if ($str2 == $json_string->str1){
echo 'Строки равны';
}else{
echo 'Строки не равны';
}
PD9waHAKCiRqc29uX3N0cmluZyA9ICd7InN0cjEiOiJ4NjZ4ZXhxIn0nOwoKJGpzb25fc3RyaW5nID0ganNvbl9kZWNvZGUoJGpzb25fc3RyaW5nKTsKCiRzdHIyID0gJ3g2NnhleHEnOwoKaWYgKCRzdHIyID09ICRqc29uX3N0cmluZy0+c3RyMSl7CiAgIGVjaG8gJ9Ch0YLRgNC+0LrQuCDRgNCw0LLQvdGLJzsKfWVsc2V7CiAgIGVjaG8gJ9Ch0YLRgNC+0LrQuCDQvdC1INGA0LDQstC90YsnOwp9