Strings

General string functions¶

string_contains(string subject, number/string/regex value) : bool¶

Returns boolean if subject contains value

string_find_first(string subject, number/string value) : number¶

Returns position of value in subject, or false if not found

string_find_last(string subject, number/string value) : number¶

Returns position of value in subject, or false if not found

string_format(string formatString, ...any items) : string¶

Sprintf-like formatting of formatString with items, see PHP sprintf docs.

string_join(string subject, array items (number/string/bool/array)) : string¶

Joins items with string subject

string_length(string string) : number¶

Returns length of string (multibyte-aware)

string_lower(string string) : string¶

Converts string to lowercase (multibyte-aware)

string_number_of(string string) : number¶

Returns number value of string

string_random(number length) : string¶

Returns a random string of length using the A–Z,a–z,0–9 alphabet.

string_replace(string subject, string/regex/array search, string replace) : string¶

Replaces string search with replace found in subject.

string_replace('this is a sentence', 'sentence', 'string') // -> this is a string

string_replace('this is great', r'(.*) is (.*)', '$1 was $2') // -> this was great

string_replace(string subject, array replace_pairs) : string¶

Replaces items found in subject using the replace_pairs array:

string_replace("hello, it's good", [
    'hello': 'hi',
    'good': 'great'
]) // -> hi, it's great

string_reverse(string subject) : string¶

Reverses string subject

string_slice(string subject, number from, number to = null) : string¶

Extracts a segment of a string. Multibyte-aware.

string_slice('hello world', 0, 5) returns hello.

string_slice('hello world', 6) returns world.

string_shuffle(string string) : string¶

Returns string where the individual characters has been shuffled.

string_split(string subject, string/regex delimiter) : array¶

Returns array of split string subject with delimiter

string_title(string string) : string¶

Returns string converted to title case.

string_title('hello world') returns Hello World.

string_upper(string string) : string¶

Converts string to UPPERCASE (multibyte-aware).

to_regex(string regex) : regex¶

Converts a regex string to a regex type

to_string(string/number/bool value) : string¶

Returns value as string

trim(string string): string¶

Returns string with space, tab and newline characters removed from the beginning and end of the string.

uuid() : string¶

Returns a random v4 UUID.

CSV¶

csv_to_array(string content, string delimiter, ?int header_offset, string enclosure, string escape) : array¶

Takes a CSV string and outputs to an array, with each row being an item in the array.

content should be a string containing the CSV document.
delimiter will explicitly set the CSV delimiter the parser will attempt to use (e.g. ;). Must be a single character. Defaults to , (comma.)
header_offset, when specified, causes the output array item's keys to be set to the header values. Setting to 0 will mark the first row as the header row.
enclosure sets the field enclosure character. Must be a single character. Defaults to " (double quote.)
escape sets the field escape character. Must be a single character. Defaults to \ (backslash.)

csv_content = 'firstname,lastname,title
"M. J.",Plumley,"Sr. Developer"
Emily,"Jenna Platt","Chief Information Officer"'

array = csv_to_array(csv_content, ',', 0)

echo(json_encode(array))

// [
//     {
//         "firstname": "John",
//         "lastname": "Doe",
//         "title": "Sr. Developer"
//     },
//     {
//         "firstname": "Emily",
//         "lastname": "Jenna Platt",
//         "title": "Chief Information Officer"
//     }
// ]

Base64¶

base64_decode(string string) : string¶

Returns a base64-decoded string.

base64url_decode(string string) : string¶

Returns a base64url-decoded string.

If the base64 string was encoded using URL-friendly base64url format, this function should be used rather the regular base64_decode function.

base64_encode(string string) : string¶

Returns base64-encoded string.

base64url_encode(string string) : string¶

Returns a URL-friendly base64url-encoded string, where characters +, / have been replaced by - and _, and any = padding characters have been removed.

Hashing¶

hash(string/number value, string algo) : string¶

Returns a hashed version of value using the algo algorithm.

'hello world'.hash('md5')  // 5eb63bbbe01eeed093cb22bb8f5acdc3

The following built-in algorithms are available: md2, md4, md5, sha1, sha224, sha256, sha384, sha512/224, sha512/256, sha512, sha3-224, sha3-256, sha3-384, sha3-512, ripemd128, ripemd160, ripemd256, ripemd320, whirlpool, tiger128,3, tiger160,3, tiger192,3, tiger128,4, tiger160,4, tiger192,4, snefru, snefru256, gost, gost-crypto, adler32, crc32, crc32b, fnv132, fnv1a32, fnv164, fnv1a64, joaat, haval128,3, haval160,3, haval192,3, haval224,3, haval256,3, haval128,4, haval160,4, haval192,4, haval224,4, haval256,4, haval128,5, haval160,5, haval192,5, haval224,5, haval256,5.

hmac(string value, string algo, string secret) : string¶

Returns the calculated message digest/hash in a hexadecimal formatted as a string.

For a list of possible values for algo, see hash() above.

In the following example, the hash needs to be converted to binary, and then to base64, to match the signature.

hmac = hmac(var('request.content'), 'sha256', 'insert_secret_here');
signature = var('request.header.x-signature', '');
hash = base64_encode(hex2bin(hmac))

if (hash != signature) {
    respond('Unauthorized', 401);
}

Cryptography¶

List of available algorithms for functions in the Cryptography section:

blake2b512
blake2s256
md4
md5
md5-sha1
ripemd160
sha1
sha224
sha256
sha3-224
sha3-256
sha3-384
sha3-512
sha384
sha512
sha512-224
sha512-256
shake128
shake256
sm3
whirlpool

sign(string value, string private_key, string algo) : false/string¶

Signs value using private_key and algo. Returns signature on success, false on failure.

For an example using sign() for JWT authorization, see here.

digest(string value, string algo) : false/string¶

Returns a cryptographic digest of value using algo. Returns false on failure.

verify(string value, string signature, string public_key, string algo) : true/false¶

Verifies value using signature, public_key and algo

HTML and Markdown¶

html_strip_tags(string string) : string¶

Returns a string with all HTML tags removed.

html_strip_tags('<b>test</b>') returns test.

html_to_text(string string) : string¶

Converts HTML to plaintext. A more aggressive version of html_strip_tags.

html_to_text('<b>test</b>') returns test.

html_decode(string string) : string¶

Decodes all HTML entities (for example,  ) to normal characters.

html_encode(string string) : string¶

Replaces characters in a string with HTML encoded versions.

markdown_to_html(string string, bool safe_mode = false) : string¶

Converts a Markdown string to HTML.

markdown_to_html('# Hello world') returns <h1>Hello world</h1>.

If safe_mode is set to true, characters like <, > are HTML-entity encoded.

JSON¶

json_decode(string json) : array¶

Decodes json and returns an array.

array = json_decode(var('request.content'))

json_encode(array array) : string¶

Takes an array and encodes it as a JSON string.

json_path(string json, string jsonpath, bool return_first = true) : string¶

Returns the result of a json string parsed using the JSONPath functionality.

Per default, if there's just one match (e.g. if matching on a property value that's a string), this value is returned. To always return an array, set return_first to false.

dump(json_path('{"v": []}', 'v[*]', false))
dump(json_path('{"v": []}', 'v[*]'))
// []
// ""

dump(json_path('{"v": ["item1"]}', 'v[*]', false))
dump(json_path('{"v": ["item1"]}', 'v[*]'))
// [0: "item1"]
// "item1"

dump(json_path('{"v": ["item1", "item2"]}', 'v[*]', false))
dump(json_path('{"v": ["item1", "item2"]}', 'v[*]'))
// [0: "item1", 1: "item2"]
// [0: "item1", 1: "item2"]

json_escape(string json) : string¶

JSON-escapes all special JSON characters like double quotes, newlines, etc.

Regex¶

preg_match(string regex, string subject) : array/false¶

Returns the matching values as an array, or false if the regex did not match. Supports regex pattern modifiers.

// Returns anything enclosed within <html> tags in a string
html = preg_match('/<html>(.*)<\\/html>/s', content)

regex_extract(regex regex, string subject) : array/false¶

Returns the matching string and all match groups as an array, and false on failure.

input = "You're a good bot"

output = regex_extract(r"You're (\w) (.*)", input)

dump(output) // [0: "You're a good bot", 1: "a", 2: "good bot"]

regex_extract_first(regex regex, string subject, any default) : string/false¶

Returns the first match group of a regex, and false (or default, if set) on failure.

input = "You're a good bot"
output = regex_extract(r"You're (.*)", input)
dump(output) // "a good bot"

input = "Hello world"
output = regex_extract(r"You're (.*)", input, 'no value')
dump(output) // "no value"

regex_match(regex regex, string subject) : string/false¶

Returns the first matching string, otherwise false.

input = "You're a good bot"

output = regex_match(r"You're .*", input)

dump(output) // "You're a good bot"

regex_to_string(regex regex) : string¶

Returns the regex converted to a string

XML¶

xml2array(string xml) : array¶

Converts XML to a WebhookScript array. This can be useful for parsing XML, or e.g. converting XML to JSON.

Note that this function is opinionated - there's no one way to convert XML to an array as XML has more features than WebhookScript arrays. Therefore the function attempts to carry over all the data by automatically generating properties like @value and @attributes depending on the input data.

For example, the following XML:

<orders>
  <record>
    <Name type="full">John Doe</Name>
    <Reference>49690</Reference>
  </record>
  <record>
    <Name type="username">someone@example.com</Name>
    <Reference>49690</Reference>
  </record>
</orders>

Converts to JSON via the following script:

json_encode(xml2array(var('request.content')))

Which returns:

{
  "orders": {
    "record": [
      {
        "Name": {
          "@value": "John Doe",
          "@attributes": {
            "type": "full"
          }
        },
        "Reference": 49690
      },
      {
        "Name": {
          "@value": "someone@example.com",
          "@attributes": {
            "type": "username"
          }
        },
        "Reference": 49690
      }
    ]
  }
}

xpath(string xpath, string input): string/null¶

Returns the first result of an XPath query on XML document input.

Given a request with the following content:

<?xml version="1.0"?>
<organization name="ExampleCo">
  <employees>
    <employee id="1">Jack</employee>
    <employee id="2">Ann</employee>
  </employees>
</organization>

xpath(var('$request.content$'), '//employee[1]') // returns "Jack"
var('$request.content$').xpath('//employee[1]') // returns "Jack"

More information and examples regarding XPath.

xpath_all(string xpath, string input): string/null¶

Returns the results of an XPath query on XML document input as an array.

Given a request with the following content:

<?xml version="1.0"?>
<organization name="ExampleCo">
  <employees>
    <employee id="1">Jack</employee>
    <employee id="2">Ann</employee>
  </employees>
</organization>

xpath_all(var('$request.content$'), '//employee]') // returns [0: "Jack", 1: "Ann"]
var('$request.content$').xpath('//employee') // returns [0: "Jack", 1: "Ann"]

More information and examples regarding XPath.

Special string functions¶

convert_kana(string, mode) : string¶

Performs a "han-kaku" - "zen-kaku" conversion for string string. This function is only useful for Japanese. See here for more info.