PHP hebrev() Function: Usage and Examples

Use hebrev() when you need to reorders selected right-to-left Hebrew text for legacy visual display systems in a PHP application. The examples below show the actual operation and its limitations.

What Is hebrev() in PHP?

Reorders selected right-to-left Hebrew text for legacy visual display systems. The exact signature supported by your installation depends on its PHP version and enabled extensions.

Its syntax is:

hebrev(string $string, int $max_chars_per_line = ...): string

Parameters and return value: The parameter types, optional arguments, references, and return type are shown in the signature above. Optional parameters are marked with an ellipsis in this reference signature.

Example 1: Basic Usage

<?php

echo strlen(hebrev("abc"));

Output:

3

Example 2: Different Input or Behavior

<?php

var_dump(is_string(hebrev("text")));

Output:

bool(true)

Practical Example: Applying the Function

<?php

$legacyText = "sample"; $converted = hebrev($legacyText); echo "Converted bytes: " . strlen($converted);

Output:

Converted bytes: 6

Important Behavior and Edge Cases

This legacy function is unsuitable for modern Unicode direction handling; prefer proper UTF-8 text and HTML direction settings.

Comparison With Related Functions

Common Beginner Mistakes

Key Takeaways

• Reorders selected right-to-left Hebrew text for legacy visual display systems.
• This legacy function is unsuitable for modern Unicode direction handling; prefer proper UTF-8 text and HTML direction settings.
• mb_convert_encoding() converts encodings; hebrev() is a legacy visual-order transformation.

Use hebrev() for the specific operation demonstrated above. Check its prerequisites and handle failure conditions before using it with production data.