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Condition Examples for Templex

The if/else feature allows you to conditionally render content based on variable values, comparisons, and boolean logic.

Basic Syntax

<{ if( condition ) }>
    Content when true
<{ endif }>

<{ if( condition ) }>
    Content when true
<{ else }>
    Content when false
<{ endif }>

Examples

Variable Self-Evaluation

A variable on its own evaluates as truthy or falsy:

<{ if( $isLoggedIn ) }>
    <p>Welcome back!</p>
<{ endif }>

Truthy values: true, 1, "true", any non-empty string or non-zero number.

Falsy values: false, 0, "false".

Boolean Literals

<{ if( true ) }>
    This is always shown
<{ endif }>

<{ if( false ) }>
    This is never shown
<{ endif }>

String Comparison

<{ if( $name === 'Fred' ) }>
    <p>Hello Fred!</p>
<{ else }>
    <p>Hello stranger!</p>
<{ endif }>

Numeric Comparison

<{ if( $age >= 18 ) }>
    <p>Adult content available</p>
<{ endif }>

<{ if( $score > 100 ) }>
    <p>High score!</p>
<{ else }>
    <p>Keep trying</p>
<{ endif }>

Variable to Variable Comparison

<{ if( $userRole === $requiredRole ) }>
    <p>Access granted</p>
<{ else }>
    <p>Access denied</p>
<{ endif }>

Not Equal

<{ if( $status != 'disabled' ) }>
    <p>Feature is available</p>
<{ endif }>

<{ if( $count !== 0 ) }>
    <p>Items found: <{ $count }></p>
<{ endif }>

Nested Conditions

Conditions can be nested within other control structures:

<{ foreach( $users as $user ) }>
    <{ if( $user === 'admin' ) }>
        <li class="admin"><{ $user }> (Admin)</li>
    <{ else }>
        <li><{ $user }></li>
    <{ endif }>
<{ endforeach }>

Elseif Chains

Chain multiple conditions without nesting:

<{ if( $status === "active" ) }>
    <span class="green">Active</span>
<{ elseif( $status === "pending" ) }>
    <span class="yellow">Pending</span>
<{ elseif( $status === "disabled" ) }>
    <span class="red">Disabled</span>
<{ else }>
    <span class="grey">Unknown</span>
<{ endif }>

Multiple elseif branches are supported. The first matching condition wins, and the else branch is optional.

Conditions Inside For Loops

<{ for( $i = 1; $i <= 10; $i++ ) }>
    <{ if( $i === $currentPage ) }>
        <span class="active"><{ $i }></span>
    <{ else }>
        <a href="?page=<{ $i }>"><{ $i }></a>
    <{ endif }>
<{ endfor }>

Negation

Negate any condition with !:

<{ if( !$banned ) }>
    <p>Welcome back.</p>
<{ endif }>

<{ if( !false ) }>
    Always shown
<{ endif }>

Negation works with logical operators:

<{ if( !$banned && $active ) }>
    Active and not banned
<{ endif }>

Logical Operators

Combine multiple conditions with && (and) and || (or):

<{ if( $isLoggedIn && $isAdmin ) }>
    <p>Welcome, administrator.</p>
<{ endif }>

<{ if( $role === "admin" || $role === "editor" ) }>
    <p>You can edit content.</p>
<{ endif }>

Chain three or more conditions:

<{ if( $a && $b && $c ) }>
    All three are truthy
<{ endif }>

Logical operators work with comparisons, self-evaluation, and inside elseif branches:

<{ if( $role === "admin" ) }>
    Admin
<{ elseif( $role === "editor" || $role === "author" ) }>
    Writer
<{ else }>
    Guest
<{ endif }>

Supported Operators

Operator Description
== Equal (loose)
=== Equal (strict)
!= Not equal (loose)
!== Not equal (strict)
> Greater than
< Less than
>= Greater than or equal
<= Less than or equal
&& Logical AND
|| Logical OR
! Negation

Supported Value Types

  • Variables: $name, $count
  • String literals: 'hello', "world"
  • Numbers: 7, 49
  • Booleans: true, false

Usage with PHP

use Myerscode\Templex\Templex;

$templex = new Templex(__DIR__ . '/templates/');

$data = [
    'isLoggedIn'   => true,
    'name'         => 'Fred',
    'role'         => 'admin',
    'score'        => 150,
    'currentPage'  => 3,
];

$result = $templex->render('my-template.stub', $data);
echo $result;