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remove_action( 'woocommerce_before_main_content', 'woocommerce_breadcrumb', 20 );

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add_action( 'woocommerce_before_main_content', 'woocommerce_breadcrumb', 5 );

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<?php
$a = 1;
code;
 
$tokens = token_get_all($code);
 
foreach ($tokens as $token) {
    if (is_array($token)) {
        echo "Line {$token[2]}: ", token_name($token[0]), " ('{$token[1]}')", PHP_EOL;
    } else {

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Line 1: T_OPEN_TAG ('<?php
')
Line 2: T_VARIABLE ('$a')
Line 2: T_WHITESPACE (' ')
string(1) "="
Line 2: T_WHITESPACE (' ')
Line 2: T_LNUMBER ('1')
string(1) ";"

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$code = <<<'code'
<?php
$a = 1;
code;

print_r(ast\parse_code($code, 30));

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ast\Node Object (
    [kind] => 132
    [flags] => 0
    [lineno] => 1
    [children] => Array (
        [0] => ast\Node Object (
            [kind] => 517
            [flags] => 0
            [lineno] => 2
            [children] => Array (

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<?php
if (PHP_VERSION === '7.1.0-dev') { 

echo 'Yay', PHP_EOL; 

}

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php -dopcache.enable_cli=1 -dopcache.optimization_level=0 -dvld.active=1 -dvld.execute=0 file.php

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line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E > > JMPZ                                                     <true>, ->3
   4     1    >   ECHO                                                     'Yay'
         2        ECHO                                                     '%0A'
   7     3    > > RETURN

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php -dopcache.enable_cli=1 -dopcache.optimization_level=1111 -dvld.active=-1 -dvld.execute=0 file.php