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PHP strrchr — Find the last occurrence of a character in a string

<?php
// get last directory in $PATH
$dir = substr(strrchr($PATH, ":"), 1);

// get everything after last newline
$text = "Line 1
Line 2
Line 3";
$last = substr(strrchr($text, 10), 1 );
?>
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PHP strrpos — Find the position of the last occurrence of a substring in a string

<?php

$pos = strrpos($mystring, "b");
if ($pos === false) { // note: three equal signs
    // not found...
}

?>
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PHP strripos — Find the position of the last occurrence of a case-insensitive substring in a string

<?php
$haystack = 'ababcd';
$needle   = 'aB';

$pos      = strripos($haystack, $needle);

if ($pos === false) {
    echo "Sorry, we did not find ($needle) in ($haystack)";
} else {
    echo "Congratulations!
";
    echo "We found the last ($needle) in ($haystack) at position ($pos)";
}
?>
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