Reference documentation and code samples for the Google API Common Protos Client class Expr.
Represents a textual expression in the Common Expression Language (CEL)
syntax. CEL is a C-like expression language. The syntax and semantics of CEL
are documented athttps://github.com/google/cel-spec.
Example (Comparison):
title: "Summary size limit"
description: "Determines if a summary is less than 100 chars"
expression: "document.summary.size() < 100"
Example (Equality):
title: "Requestor is owner"
description: "Determines if requestor is the document owner"
expression: "document.owner == request.auth.claims.email"
Example (Logic):
title: "Public documents"
description: "Determine whether the document should be publicly visible"
expression: "document.type != 'private' && document.type != 'internal'"
Example (Data Manipulation):
title: "Notification string"
description: "Create a notification string with a timestamp."
expression: "'New message received at ' + string(document.create_time)"
The exact variables and functions that may be referenced within an expression
are determined by the service that evaluates it. See the service
documentation for additional information.
Generated from protobuf messagegoogle.type.Expr
Namespace
Google \ Type
Methods
__construct
Constructor.
Parameters
Name
Description
data
array
Optional. Data for populating the Message object.
↳ expression
string
Textual representation of an expression in Common Expression Language syntax.
↳ title
string
Optional. Title for the expression, i.e. a short string describing its purpose. This can be used e.g. in UIs which allow to enter the expression.
↳ description
string
Optional. Description of the expression. This is a longer text which describes the expression, e.g. when hovered over it in a UI.
↳ location
string
Optional. String indicating the location of the expression for error reporting, e.g. a file name and a position in the file.
getExpression
Textual representation of an expression in Common Expression Language
syntax.
Returns
Type
Description
string
setExpression
Textual representation of an expression in Common Expression Language
syntax.
Parameter
Name
Description
var
string
Returns
Type
Description
$this
getTitle
Optional. Title for the expression, i.e. a short string describing
its purpose. This can be used e.g. in UIs which allow to enter the
expression.
Returns
Type
Description
string
setTitle
Optional. Title for the expression, i.e. a short string describing
its purpose. This can be used e.g. in UIs which allow to enter the
expression.
Parameter
Name
Description
var
string
Returns
Type
Description
$this
getDescription
Optional. Description of the expression. This is a longer text which
describes the expression, e.g. when hovered over it in a UI.
Returns
Type
Description
string
setDescription
Optional. Description of the expression. This is a longer text which
describes the expression, e.g. when hovered over it in a UI.
Parameter
Name
Description
var
string
Returns
Type
Description
$this
getLocation
Optional. String indicating the location of the expression for error
reporting, e.g. a file name and a position in the file.
Returns
Type
Description
string
setLocation
Optional. String indicating the location of the expression for error
reporting, e.g. a file name and a position in the file.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Google API Common Protos Client - Class Expr (4.12.3)\n\nVersion latestkeyboard_arrow_down\n\n- [4.12.3 (latest)](/php/docs/reference/common-protos/latest/Type.Expr)\n- [4.12.2](/php/docs/reference/common-protos/4.12.2/Type.Expr)\n- [4.11.0](/php/docs/reference/common-protos/4.11.0/Type.Expr)\n- [4.10.0](/php/docs/reference/common-protos/4.10.0/Type.Expr)\n- [4.9.0](/php/docs/reference/common-protos/4.9.0/Type.Expr)\n- [4.8.3](/php/docs/reference/common-protos/4.8.3/Type.Expr) \nReference documentation and code samples for the Google API Common Protos Client class Expr.\n\nRepresents a textual expression in the Common Expression Language (CEL)\nsyntax. CEL is a C-like expression language. The syntax and semantics of CEL\nare documented at \u003chttps://github.com/google/cel-spec\u003e.\n\nExample (Comparison):\ntitle: \"Summary size limit\"\ndescription: \"Determines if a summary is less than 100 chars\"\nexpression: \"document.summary.size() \\\u003c 100\"\nExample (Equality):\ntitle: \"Requestor is owner\"\ndescription: \"Determines if requestor is the document owner\"\nexpression: \"document.owner == request.auth.claims.email\"\nExample (Logic):\ntitle: \"Public documents\"\ndescription: \"Determine whether the document should be publicly visible\"\nexpression: \"document.type != 'private' \\&\\& document.type != 'internal'\"\nExample (Data Manipulation):\ntitle: \"Notification string\"\ndescription: \"Create a notification string with a timestamp.\"\nexpression: \"'New message received at ' + string(document.create_time)\"\nThe exact variables and functions that may be referenced within an expression\nare determined by the service that evaluates it. See the service\ndocumentation for additional information.\n\nGenerated from protobuf message `google.type.Expr`\n\nNamespace\n---------\n\nGoogle \\\\ Type\n\nMethods\n-------\n\n### __construct\n\nConstructor.\n\n### getExpression\n\nTextual representation of an expression in Common Expression Language\nsyntax.\n\n### setExpression\n\nTextual representation of an expression in Common Expression Language\nsyntax.\n\n### getTitle\n\nOptional. Title for the expression, i.e. a short string describing\nits purpose. This can be used e.g. in UIs which allow to enter the\nexpression.\n\n### setTitle\n\nOptional. Title for the expression, i.e. a short string describing\nits purpose. This can be used e.g. in UIs which allow to enter the\nexpression.\n\n### getDescription\n\nOptional. Description of the expression. This is a longer text which\ndescribes the expression, e.g. when hovered over it in a UI.\n\n### setDescription\n\nOptional. Description of the expression. This is a longer text which\ndescribes the expression, e.g. when hovered over it in a UI.\n\n### getLocation\n\nOptional. String indicating the location of the expression for error\nreporting, e.g. a file name and a position in the file.\n\n### setLocation\n\nOptional. String indicating the location of the expression for error\nreporting, e.g. a file name and a position in the file."]]
