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Sheath rule

blade-valid-echo-expression

Echo contents must be a parseable PHP expression without the echo terminator embedded in it.
Package
Core
Category
Blade
Default severity
error by default
Auto-fix
Manual fix

#Why

Blade treats the first }} as the end of a {{ }} echo, even when it appears inside a PHP string literal:

{{ "literal }} inside" }}



compiles to



<?php echo e("literal); ?> inside" }}

The string is cut mid-literal, the compiled view is invalid PHP, and the rest of the expression appears on the page as text. {!! !!} truncates the same way at !!}, and {{{ }}} at }}}.

Empty echoes are the same class of defect: {{ }} compiles into mangled PHP rather than being skipped. Blade also wraps whatever the echo contains in echo e(...) unchanged, so content that is not a PHP expression, such as two statements or an embedded semicolon, compiles into a view that dies at first render.

#Examples

#Bad

<p>{{ "literal }} inside" }}</p>

<p>{!! "x!!} y" !!}</p>

<p>{{ }}</p>

<div class="{{ }}">Styled</div>

<p>{{ $first; $second }}</p>

#Good

<p>{{ $user->name }}</p>

<p>{{ $user->isAdmin() ? 'Admin' : 'Member' }}</p>

<p>{{ $name ?? 'Guest' }}</p>

<p>{{ $name; }}</p>

<p>{!! $trustedHtml !!}</p>

{{-- Only !!} ends a raw echo, so }} inside one is fine --}}

<p>{!! $a . "}}" !!}</p>

{{-- Multiline echoes are supported --}}

{{ $user

    ->name }}

{{-- Escaped echoes and verbatim blocks belong to the frontend --}}

<p>@{{ vueExpression }}</p>

@verbatim

    <p>{{ alsoVue }}</p>

@endverbatim

#Notes

  • Echoes inside attribute values are checked too: class="{{ }}" miscompiles exactly like an echo in text position.
  • To emit a literal }}, build it without writing the sequence: {{ '}'.'}' }}, or move the text to a variable.
  • Dynamic or unusual expressions are accepted when they are valid PHP.
  • Laravel intentionally removes one final semicolon from an echo expression, so {{ $value; }} and the equivalent raw/triple forms are valid.

#Related Rules