I am using a file containing a json string to create request validations. One of the slices of JSON in one of my tests looks like this:
{
"name": "pattern",
"attributes": [
{
"name": "pattern",
"value": "^[\d]{2}$"
}
]
}
when you try to use json_decode() on this string however, you get a json syntax error. It has something to do with the content of the regular expression. Why and is there a way around this?
The backslash needs to be escaped:
"value": "^[\\d]{2}$"
JSON allows the following tokens in strings:
- any-Unicode-character-except-
"-or-\-or-control-character\"\\\/\b\f\t\u four-hex-digits
\d is not allowed.
You need to escape out the \, as \d isn't a valid control character in JSON.