Online PHP editor | output for 7OZ5d

@ 2018-04-01T12:40:45Z

<?php

$sentences = [
0 => 'The tiger is the national animal of India',
1 => 'The tiger is a large carnivorous mammal that roams the forests',
2 => 'The tiger feeds on animals that also live in the forest',
3 => 'The tiger does have a coat of orange with black stripes',
4 => 'Tigers, regardless of their subspecies, are carnivorous animals',
5 => 'The tiger is a protected species',
];

foreach  ($sentences as $sentence) {
    $letters = preg_match_all ('~[a-z\d]~', strtolower($sentence), $out) ? $out [0] : [];
    $occurrences = array_count_values($letters);
    arsort($occurrences);
    $result[] = [
        "sentence" => $sentence,
        "character" => key($occurrences), 
        "occurrences" => current($occurrences)
    ];
}

var_export($result);

Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: array ( 0 => array ( 'sentence' => 'The tiger is the national animal of India', 'character' => 'i', 'occurrences' => 6, ), 1 => array ( 'sentence' => 'The tiger is a large carnivorous mammal that roams the forests', 'character' => 'a', 'occurrences' => 7, ), 2 => array ( 'sentence' => 'The tiger feeds on animals that also live in the forest', 'character' => 'e', 'occurrences' => 7, ), 3 => array ( 'sentence' => 'The tiger does have a coat of orange with black stripes', 'character' => 'e', 'occurrences' => 6, ), 4 => array ( 'sentence' => 'Tigers, regardless of their subspecies, are carnivorous animals', 'character' => 's', 'occurrences' => 8, ), 5 => array ( 'sentence' => 'The tiger is a protected species', 'character' => 'e', 'occurrences' => 6, ), )

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