回答編集履歴
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test
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@@ -27,3 +27,47 @@
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とりあえずifなしでそのままechoしてみればどう扱われているか分かると思います。
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要するにデバッグを。
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```php
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echo __LINE__."<br>";
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foreach(['chicken','lemon','bread','water'] as $ing){
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echo __LINE__."<br>";
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if($soup->hasIngredient($ing)){
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echo __LINE__."<br>";
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print "Soup contains $ing.\n";
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echo "<br>";
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}
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echo __LINE__."<br>";
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if($sandwich->hasIngredient($ing)){
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echo __LINE__."<br>";
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print "Sandwich contains $ing.\n";
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echo "<br>";
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}
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echo __LINE__."<br>";
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}
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```
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