1.2.877. Only First Byte

When assigning a char to a string with an array notation, only the first byte is used.

<?php
    $str = 'xy';

    // first letter is now a
    $str[0] = 'a';

    // second letter is now b, c is ignored
    $str[1] = 'bc';
?>

See also String access and modification by character.

1.2.877.1. Suggestions

• Remove extra bytes when assigning to a string

• Use concatenation

• Use strpos() and substr() functions

• Use explode(), implode() functions and array manipulations

1.2.877.2. Specs

Short name	Structures/OnlyFirstByte
Rulesets	All, Analyze, Changed Behavior
Exakat since	2.2.2
PHP Version	All
Severity	Minor
Time To Fix	Quick (30 mins)
Changed Behavior	PHP 8.0 - More
Precision	High
Available in	Entreprise Edition, Exakat Cloud